22021503012 has 18 divisors (see below), whose sum is σ = 55665466038. Its totient is φ = 7340500992.

The previous prime is 22021502969. The next prime is 22021503059. The reversal of 22021503012 is 21030512022.

It can be written as a sum of positive squares in only one way, i.e., 21238398756 + 783104256 = 145734^2 + 27984^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 305854173 + ... + 305854244.

It is an arithmetic number, because the mean of its divisors is an integer number (3092525891).

Almost surely, 2^22021503012 is an apocalyptic number.

It is an amenable number.

22021503012 is an abundant number, since it is smaller than the sum of its proper divisors (33643963026).

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

22021503012 is a wasteful number, since it uses less digits than its factorization.

22021503012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611708427 (or 611708422 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The spelling of 22021503012 in words is "twenty-two billion, twenty-one million, five hundred three thousand, twelve".