18620642072 has 16 divisors (see below), whose sum is σ = 34922283000. Its totient is φ = 9308033280.

The previous prime is 18620642071. The next prime is 18620642081. The reversal of 18620642072 is 27024602681.

It is a super-2 number, since 2×18620642072² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18620642071) 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, 251129 + ... + 316712.

Almost surely, 2^18620642072 is an apocalyptic number.

It is an amenable number.

18620642072 is a deficient number, since it is larger than the sum of its proper divisors (16301640928).

18620642072 is a wasteful number, since it uses less digits than its factorization.

18620642072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571946 (or 571942 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The spelling of 18620642072 in words is "eighteen billion, six hundred twenty million, six hundred forty-two thousand, seventy-two".