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20310252025 = 5272833971033
BaseRepresentation
bin10010111010100101…
…011101100111111001
31221102110022201000111
4102322211131213321
5313043411031100
613155211104321
71316210202520
oct227245354771
957373281014
1020310252025
118682675a58
123b29a420a1
131bb8a54c0b
14da95a74b7
157dd1026ba
hex4ba95d9f9

20310252025 has 48 divisors (see below), whose sum is σ = 28985021824. Its totient is φ = 13829460480.

The previous prime is 20310252023. The next prime is 20310252077. The reversal of 20310252025 is 52025201302.

It is not a de Polignac number, because 20310252025 - 21 = 20310252023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20310251987 and 20310252005.

It is not an unprimeable number, because it can be changed into a prime (20310252023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19660909 + ... + 19661941.

Almost surely, 220310252025 is an apocalyptic number.

20310252025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20310252025 is a deficient number, since it is larger than the sum of its proper divisors (8674769799).

20310252025 is a wasteful number, since it uses less digits than its factorization.

20310252025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1730 (or 1725 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

Adding to 20310252025 its reverse (52025201302), we get a palindrome (72335453327).

The spelling of 20310252025 in words is "twenty billion, three hundred ten million, two hundred fifty-two thousand, twenty-five".

Divisors: 1 5 7 25 35 175 283 397 1033 1415 1981 1985 2779 5165 7075 7231 9905 9925 13895 25825 36155 49525 69475 112351 180775 292339 410101 561755 786457 1461695 2046373 2050505 2808775 2870707 3932285 7308475 10231865 10252525 14353535 19661425 51159325 71767675 116058583 580292915 812410081 2901464575 4062050405 20310252025