45021664020 has 48 divisors (see below), whose sum is σ = 126256818240. Its totient is φ = 11987095296.

The previous prime is 45021663961. The next prime is 45021664057. The reversal of 45021664020 is 2046612054.

It is a super-2 number, since 2×45021664020² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 544905 + ... + 622064.

It is an arithmetic number, because the mean of its divisors is an integer number (2630350380).

Almost surely, 2^45021664020 is an apocalyptic number.

It is an amenable number.

45021664020 is an abundant number, since it is smaller than the sum of its proper divisors (81235154220).

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

45021664020 is a wasteful number, since it uses less digits than its factorization.

45021664020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167624 (or 1167622 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The spelling of 45021664020 in words is "forty-five billion, twenty-one million, six hundred sixty-four thousand, twenty".