20518618076 has 36 divisors (see below), whose sum is σ = 39642747144. Its totient is φ = 9285508320.

The previous prime is 20518618063. The next prime is 20518618171. The reversal of 20518618076 is 67081681502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16490 + ... + 203246.

Almost surely, 2^20518618076 is an apocalyptic number.

It is an amenable number.

20518618076 is a deficient number, since it is larger than the sum of its proper divisors (19124129068).

20518618076 is a wasteful number, since it uses less digits than its factorization.

20518618076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187010 (or 186997 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 44.

The spelling of 20518618076 in words is "twenty billion, five hundred eighteen million, six hundred eighteen thousand, seventy-six".