20100502431 has 24 divisors (see below), whose sum is σ = 30117884160. Its totient is φ = 13396556952.

The previous prime is 20100502423. The next prime is 20100502459. The reversal of 20100502431 is 13420500102.

20100502431 is a `hidden beast` number, since 20 + 100 + 502 + 43 + 1 = 666.

It is not a de Polignac number, because 20100502431 - 2³ = 20100502423 is a prime.

It is a super-2 number, since 2×20100502431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100502481) 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 23 ways as a sum of consecutive naturals, for example, 1050730 + ... + 1069688.

It is an arithmetic number, because the mean of its divisors is an integer number (1254911840).

Almost surely, 2^20100502431 is an apocalyptic number.

20100502431 is a deficient number, since it is larger than the sum of its proper divisors (10017381729).

20100502431 is an equidigital number, since it uses as much as digits as its factorization.

20100502431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23337 (or 23325 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The spelling of 20100502431 in words is "twenty billion, one hundred million, five hundred two thousand, four hundred thirty-one".