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20424503121 = 3115910490243
BaseRepresentation
bin10011000001011001…
…010010111101010001
31221201102022021001120
4103001121102331101
5313312133044441
613214411552453
71322065261221
oct230131227521
957642267046
1020424503121
118731110550
123b6015b729
131c06618209
14dba828081
157e816e966
hex4c1652f51

20424503121 has 16 divisors (see below), whose sum is σ = 30211902720. Its totient is φ = 12168680720.

The previous prime is 20424503107. The next prime is 20424503129. The reversal of 20424503121 is 12130542402.

It is a cyclic number.

It is not a de Polignac number, because 20424503121 - 222 = 20420308817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20424503091 and 20424503100.

It is not an unprimeable number, because it can be changed into a prime (20424503129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5243175 + ... + 5247068.

It is an arithmetic number, because the mean of its divisors is an integer number (1888243920).

Almost surely, 220424503121 is an apocalyptic number.

It is an amenable number.

20424503121 is a deficient number, since it is larger than the sum of its proper divisors (9787399599).

20424503121 is a wasteful number, since it uses less digits than its factorization.

20424503121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10490316.

The product of its (nonzero) digits is 1920, while the sum is 24.

The spelling of 20424503121 in words is "twenty billion, four hundred twenty-four million, five hundred three thousand, one hundred twenty-one".

Divisors: 1 3 11 33 59 177 649 1947 10490243 31470729 115392673 346178019 618924337 1856773011 6808167707 20424503121