20268660660 has 24 divisors (see below), whose sum is σ = 56752250016. Its totient is φ = 5404976160.

The previous prime is 20268660649. The next prime is 20268660677. The reversal of 20268660660 is 6606686202.

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, 168905446 + ... + 168905565.

It is an arithmetic number, because the mean of its divisors is an integer number (2364677084).

Almost surely, 2^20268660660 is an apocalyptic number.

20268660660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20268660660 is an abundant number, since it is smaller than the sum of its proper divisors (36483589356).

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

20268660660 is a wasteful number, since it uses less digits than its factorization.

20268660660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337811023 (or 337811021 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 42.

The spelling of 20268660660 in words is "twenty billion, two hundred sixty-eight million, six hundred sixty thousand, six hundred sixty".