21722145043604 has 24 divisors (see below), whose sum is σ = 38254667351040. Its totient is φ = 10792285278176.

The previous prime is 21722145043591. The next prime is 21722145043631. The reversal of 21722145043604 is 40634054122712.

It is a super-2 number, since 2×21722145043604² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3724307 + ... + 7570650.

It is an arithmetic number, because the mean of its divisors is an integer number (1593944472960).

Almost surely, 2^{21722145043604} is an apocalyptic number.

It is an amenable number.

21722145043604 is a deficient number, since it is larger than the sum of its proper divisors (16532522307436).

21722145043604 is a wasteful number, since it uses less digits than its factorization.

21722145043604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11298007 (or 11298005 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 41.

The spelling of 21722145043604 in words is "twenty-one trillion, seven hundred twenty-two billion, one hundred forty-five million, forty-three thousand, six hundred four".