20500002536 has 32 divisors (see below), whose sum is σ = 41400828840. Its totient is φ = 9460032768.

The previous prime is 20500002527. The next prime is 20500002673. The reversal of 20500002536 is 63520000502.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10061293636 + 10438708900 = 100306^2 + 102170^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 891050 + ... + 913766.

Almost surely, 2^20500002536 is an apocalyptic number.

20500002536 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20500002536 is an abundant number, since it is smaller than the sum of its proper divisors (20900826304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20500002536 is a wasteful number, since it uses less digits than its factorization.

20500002536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31413 (or 31409 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The spelling of 20500002536 in words is "twenty billion, five hundred million, two thousand, five hundred thirty-six".