21082706525 has 12 divisors (see below), whose sum is σ = 26150817312. Its totient is φ = 16860835440.

The previous prime is 21082706507. The next prime is 21082706539. The reversal of 21082706525 is 52560728012.

It is not a de Polignac number, because 21082706525 - 2²⁴ = 21065929309 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 51569 + ... + 211718.

It is an arithmetic number, because the mean of its divisors is an integer number (2179234776).

Almost surely, 2^21082706525 is an apocalyptic number.

21082706525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21082706525 is a deficient number, since it is larger than the sum of its proper divisors (5068110787).

21082706525 is a wasteful number, since it uses less digits than its factorization.

21082706525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266500 (or 266495 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The spelling of 21082706525 in words is "twenty-one billion, eighty-two million, seven hundred six thousand, five hundred twenty-five".