20599996536 has 96 divisors (see below), whose sum is σ = 67117814400. Its totient is φ = 5575936320.

The previous prime is 20599996523. The next prime is 20599996537. The reversal of 20599996536 is 63569999502.

20599996536 is a `hidden beast` number, since 2 + 0 + 5 + 9 + 9 + 9 + 96 + 536 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20599996537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1066030 + ... + 1085181.

It is an arithmetic number, because the mean of its divisors is an integer number (699143900).

Almost surely, 2^20599996536 is an apocalyptic number.

It is an amenable number.

20599996536 is an abundant number, since it is smaller than the sum of its proper divisors (46517817864).

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

20599996536 is a wasteful number, since it uses less digits than its factorization.

20599996536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151249 (or 2151242 counting only the distinct ones).

The product of its (nonzero) digits is 35429400, while the sum is 63.

The spelling of 20599996536 in words is "twenty billion, five hundred ninety-nine million, nine hundred ninety-six thousand, five hundred thirty-six".