21045182032 has 40 divisors (see below), whose sum is σ = 46622462400. Its totient is φ = 9015025152.

The previous prime is 21045182027. The next prime is 21045182047. The reversal of 21045182032 is 23028154012.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194319 + ... + 282577.

It is an arithmetic number, because the mean of its divisors is an integer number (1165561560).

Almost surely, 2^21045182032 is an apocalyptic number.

It is an amenable number.

21045182032 is an abundant number, since it is smaller than the sum of its proper divisors (25577280368).

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

21045182032 is a wasteful number, since it uses less digits than its factorization.

21045182032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90403 (or 90397 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The spelling of 21045182032 in words is "twenty-one billion, forty-five million, one hundred eighty-two thousand, thirty-two".