21674447542525 has 48 divisors (see below), whose sum is σ = 29189519251200. Its totient is φ = 15912993058560.

The previous prime is 21674447542469. The next prime is 21674447542609. The reversal of 21674447542525 is 52524574447612.

It is not a de Polignac number, because 21674447542525 - 2²⁵ = 21674413988093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21674447542525.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3460234 + ... + 7437883.

It is an arithmetic number, because the mean of its divisors is an integer number (608114984400).

Almost surely, 2^{21674447542525} is an apocalyptic number.

21674447542525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21674447542525 is a deficient number, since it is larger than the sum of its proper divisors (7515071708675).

21674447542525 is a wasteful number, since it uses less digits than its factorization.

21674447542525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10898278 (or 10898273 counting only the distinct ones).

The product of its digits is 75264000, while the sum is 58.

The spelling of 21674447542525 in words is "twenty-one trillion, six hundred seventy-four billion, four hundred forty-seven million, five hundred forty-two thousand, five hundred twenty-five".