21441555001204 has 48 divisors (see below), whose sum is σ = 40674767049280. Its totient is φ = 9889632286560.

The previous prime is 21441555001177. The next prime is 21441555001247. The reversal of 21441555001204 is 40210055514412.

It is a self number, because there is not a number n which added to its sum of digits gives 21441555001204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12657607 + ... + 14251249.

Almost surely, 2^{21441555001204} is an apocalyptic number.

It is an amenable number.

21441555001204 is a deficient number, since it is larger than the sum of its proper divisors (19233212048076).

21441555001204 is a wasteful number, since it uses less digits than its factorization.

21441555001204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595217 (or 1595189 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 34.

The spelling of 21441555001204 in words is "twenty-one trillion, four hundred forty-one billion, five hundred fifty-five million, one thousand, two hundred four".