20635365051 has 72 divisors (see below), whose sum is σ = 36920117520. Its totient is φ = 11035293696.

The previous prime is 20635365029. The next prime is 20635365089. The reversal of 20635365051 is 15056353602.

20635365051 is a `hidden beast` number, since 20 + 6 + 3 + 536 + 50 + 51 = 666.

It is not a de Polignac number, because 20635365051 - 2¹⁵ = 20635332283 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20635364997 and 20635365015.

It is not an unprimeable number, because it can be changed into a prime (20635365001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1334275 + ... + 1349651.

It is an arithmetic number, because the mean of its divisors is an integer number (512779410).

Almost surely, 2^20635365051 is an apocalyptic number.

20635365051 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20635365051 is a deficient number, since it is larger than the sum of its proper divisors (16284752469).

20635365051 is a wasteful number, since it uses less digits than its factorization.

20635365051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15593 (or 15583 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The spelling of 20635365051 in words is "twenty billion, six hundred thirty-five million, three hundred sixty-five thousand, fifty-one".