20665327836 has 24 divisors (see below), whose sum is σ = 48230581504. Its totient is φ = 6886802160.

The previous prime is 20665327757. The next prime is 20665327871. The reversal of 20665327836 is 63872356602.

It is a congruent number.

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, 152020 + ... + 253851.

Almost surely, 2^20665327836 is an apocalyptic number.

It is an amenable number.

20665327836 is an abundant number, since it is smaller than the sum of its proper divisors (27565253668).

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

20665327836 is a wasteful number, since it uses less digits than its factorization.

20665327836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410121 (or 410119 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 48.

The spelling of 20665327836 in words is "twenty billion, six hundred sixty-five million, three hundred twenty-seven thousand, eight hundred thirty-six".