21425508349425 has 96 divisors (see below), whose sum is σ = 40200604853760. Its totient is φ = 11182777228800.

The previous prime is 21425508349393. The next prime is 21425508349517. The reversal of 21425508349425 is 52494380552412.

21425508349425 is a `hidden beast` number, since 2 + 1 + 4 + 2 + 5 + 50 + 83 + 494 + 25 = 666.

It is not a de Polignac number, because 21425508349425 - 2⁵ = 21425508349393 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 441365655 + ... + 441414195.

It is an arithmetic number, because the mean of its divisors is an integer number (418756300560).

Almost surely, 2^{21425508349425} is an apocalyptic number.

21425508349425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21425508349425 is a deficient number, since it is larger than the sum of its proper divisors (18775096504335).

21425508349425 is a wasteful number, since it uses less digits than its factorization.

21425508349425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62520 (or 62509 counting only the distinct ones).

The product of its (nonzero) digits is 13824000, while the sum is 54.

The spelling of 21425508349425 in words is "twenty-one trillion, four hundred twenty-five billion, five hundred eight million, three hundred forty-nine thousand, four hundred twenty-five".