21054524025 has 12 divisors (see below), whose sum is σ = 34810146512. Its totient is φ = 11229079440.

The previous prime is 21054523969. The next prime is 21054524041. The reversal of 21054524025 is 52042545012.

It is not a de Polignac number, because 21054524025 - 2¹⁶ = 21054458489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21054523983 and 21054524001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140363419 + ... + 140363568.

Almost surely, 2^21054524025 is an apocalyptic number.

21054524025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21054524025 is a deficient number, since it is larger than the sum of its proper divisors (13755622487).

21054524025 is a wasteful number, since it uses less digits than its factorization.

21054524025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280727000 (or 280726995 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

The spelling of 21054524025 in words is "twenty-one billion, fifty-four million, five hundred twenty-four thousand, twenty-five".