20456636103 has 40 divisors (see below), whose sum is σ = 31907014656. Its totient is φ = 13036755600.

The previous prime is 20456636099. The next prime is 20456636111. The reversal of 20456636103 is 30163665402.

20456636103 is a `hidden beast` number, since 2 + 0 + 4 + 5 + 6 + 636 + 10 + 3 = 666.

It is not a de Polignac number, because 20456636103 - 2² = 20456636099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20456636153) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4974018 + ... + 4978128.

Almost surely, 2^20456636103 is an apocalyptic number.

20456636103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20456636103 is a deficient number, since it is larger than the sum of its proper divisors (11450378553).

20456636103 is a wasteful number, since it uses less digits than its factorization.

20456636103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6817 (or 6808 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 20456636103 in words is "twenty billion, four hundred fifty-six million, six hundred thirty-six thousand, one hundred three".