22000621538 has 32 divisors (see below), whose sum is σ = 39027605760. Its totient is φ = 9100969920.

The previous prime is 22000621537. The next prime is 22000621543. The reversal of 22000621538 is 83512600022.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a self number, because there is not a number n which added to its sum of digits gives 22000621538.

It is not an unprimeable number, because it can be changed into a prime (22000621537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1887368 + ... + 1898988.

It is an arithmetic number, because the mean of its divisors is an integer number (1219612680).

Almost surely, 2^22000621538 is an apocalyptic number.

22000621538 is a deficient number, since it is larger than the sum of its proper divisors (17026984222).

22000621538 is a wasteful number, since it uses less digits than its factorization.

22000621538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16322.

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 22000621538 in words is "twenty-two billion, six hundred twenty-one thousand, five hundred thirty-eight".