22156447404 has 72 divisors (see below), whose sum is σ = 64765022448. Its totient is φ = 5843456640.

The previous prime is 22156447349. The next prime is 22156447451. The reversal of 22156447404 is 40474465122.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1441627 + ... + 1456914.

Almost surely, 2^22156447404 is an apocalyptic number.

It is an amenable number.

22156447404 is an abundant number, since it is smaller than the sum of its proper divisors (42608575044).

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

22156447404 is a wasteful number, since it uses less digits than its factorization.

22156447404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898575 (or 2898566 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 39.

The spelling of 22156447404 in words is "twenty-two billion, one hundred fifty-six million, four hundred forty-seven thousand, four hundred four".