21374452657725 has 12 divisors (see below), whose sum is σ = 35339095060896. Its totient is φ = 11399708084080.

The previous prime is 21374452657669. The next prime is 21374452657759. The reversal of 21374452657725 is 52775625447312.

It is not a de Polignac number, because 21374452657725 - 2⁶ = 21374452657661 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142496350977 + ... + 142496351126.

It is an arithmetic number, because the mean of its divisors is an integer number (2944924588408).

Almost surely, 2^{21374452657725} is an apocalyptic number.

21374452657725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21374452657725 is a deficient number, since it is larger than the sum of its proper divisors (13964642403171).

21374452657725 is a wasteful number, since it uses less digits than its factorization.

21374452657725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284992702116 (or 284992702111 counting only the distinct ones).

The product of its digits is 98784000, while the sum is 60.

The spelling of 21374452657725 in words is "twenty-one trillion, three hundred seventy-four billion, four hundred fifty-two million, six hundred fifty-seven thousand, seven hundred twenty-five".