45021636 has 48 divisors (see below), whose sum is σ = 127337280. Its totient is φ = 13642560.

The previous prime is 45021617. The next prime is 45021643. The reversal of 45021636 is 63612054.

45021636 is a `hidden beast` number, since 4 + 5 + 0 + 21 + 636 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 17761 + ... + 20136.

It is an arithmetic number, because the mean of its divisors is an integer number (2652860).

Almost surely, 2^45021636 is an apocalyptic number.

It is an amenable number.

45021636 is an abundant number, since it is smaller than the sum of its proper divisors (82315644).

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

45021636 is a wasteful number, since it uses less digits than its factorization.

45021636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37921 (or 37913 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 45021636 is about 6709.8163909305. The cubic root of 45021636 is about 355.7463264588.

The spelling of 45021636 in words is "forty-five million, twenty-one thousand, six hundred thirty-six".