21252677125 has 32 divisors (see below), whose sum is σ = 26872110720. Its totient is φ = 16779312000.

The previous prime is 21252677021. The next prime is 21252677137. The reversal of 21252677125 is 52177625212.

It is not a de Polignac number, because 21252677125 - 2¹⁷ = 21252546053 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7151890 + ... + 7154860.

It is an arithmetic number, because the mean of its divisors is an integer number (839753460).

Almost surely, 2^21252677125 is an apocalyptic number.

21252677125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21252677125 is a deficient number, since it is larger than the sum of its proper divisors (5619433595).

21252677125 is an equidigital number, since it uses as much as digits as its factorization.

21252677125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3718 (or 3708 counting only the distinct ones).

The product of its digits is 117600, while the sum is 40.

The spelling of 21252677125 in words is "twenty-one billion, two hundred fifty-two million, six hundred seventy-seven thousand, one hundred twenty-five".