20450636536 has 16 divisors (see below), whose sum is σ = 41830847640. Its totient is φ = 9295743840.

The previous prime is 20450636519. The next prime is 20450636539. The reversal of 20450636536 is 63563605402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20450636539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116196711 + ... + 116196886.

Almost surely, 2^20450636536 is an apocalyptic number.

It is an amenable number.

20450636536 is an abundant number, since it is smaller than the sum of its proper divisors (21380211104).

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

20450636536 is a wasteful number, since it uses less digits than its factorization.

20450636536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232393614 (or 232393610 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 40.

The spelling of 20450636536 in words is "twenty billion, four hundred fifty million, six hundred thirty-six thousand, five hundred thirty-six".