21413407661372 has 12 divisors (see below), whose sum is σ = 37805086978176. Its totient is φ = 10611954239040.

The previous prime is 21413407661297. The next prime is 21413407661389. The reversal of 21413407661372 is 27316670431412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23687397404 + ... + 23687398307.

It is an arithmetic number, because the mean of its divisors is an integer number (3150423914848).

Almost surely, 2^{21413407661372} is an apocalyptic number.

It is an amenable number.

21413407661372 is a deficient number, since it is larger than the sum of its proper divisors (16391679316804).

21413407661372 is a wasteful number, since it uses less digits than its factorization.

21413407661372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47374795828 (or 47374795826 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 47.

The spelling of 21413407661372 in words is "twenty-one trillion, four hundred thirteen billion, four hundred seven million, six hundred sixty-one thousand, three hundred seventy-two".