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20925777653 = 111902343423
BaseRepresentation
bin10011011111010001…
…100000011011110101
32000000100112122102222
4103133101200123311
5320323444341103
613340240012125
71340363114054
oct233721403365
960010478388
1020925777653
118969068520
124080001045
131c86428471
14102723239b
1582718a638
hex4df4606f5

20925777653 has 4 divisors (see below), whose sum is σ = 22828121088. Its totient is φ = 19023434220.

The previous prime is 20925777641. The next prime is 20925777713. The reversal of 20925777653 is 35677752902.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20925777653 - 26 = 20925777589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20925777595 and 20925777604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20925777253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 951171701 + ... + 951171722.

It is an arithmetic number, because the mean of its divisors is an integer number (5707030272).

Almost surely, 220925777653 is an apocalyptic number.

It is an amenable number.

20925777653 is a deficient number, since it is larger than the sum of its proper divisors (1902343435).

20925777653 is a wasteful number, since it uses less digits than its factorization.

20925777653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1902343434.

The product of its (nonzero) digits is 5556600, while the sum is 53.

The spelling of 20925777653 in words is "twenty billion, nine hundred twenty-five million, seven hundred seventy-seven thousand, six hundred fifty-three".

Divisors: 1 11 1902343423 20925777653