21604025707407 has 192 divisors, whose sum is σ = 37525521825792. Its totient is φ = 11804758560000.

The previous prime is 21604025707379. The next prime is 21604025707471. The reversal of 21604025707407 is 70470752040612.

21604025707407 is a `hidden beast` number, since 2 + 1 + 6 + 0 + 4 + 0 + 2 + 570 + 74 + 0 + 7 = 666.

It is not a de Polignac number, because 21604025707407 - 2⁸ = 21604025707151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21604025707487) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 14889059032 + ... + 14889060482.

It is an arithmetic number, because the mean of its divisors is an integer number (195445426176).

Almost surely, 2^{21604025707407} is an apocalyptic number.

21604025707407 is a deficient number, since it is larger than the sum of its proper divisors (15921496118385).

21604025707407 is a wasteful number, since it uses less digits than its factorization.

21604025707407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962 (or 2959 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 45.

The spelling of 21604025707407 in words is "twenty-one trillion, six hundred four billion, twenty-five million, seven hundred seven thousand, four hundred seven".