21025596 has 24 divisors (see below), whose sum is σ = 49538944. Its totient is φ = 6940080.

The previous prime is 21025561. The next prime is 21025601. The reversal of 21025596 is 69552012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7270 + ... + 9741.

Almost surely, 2^21025596 is an apocalyptic number.

It is an amenable number.

21025596 is an abundant number, since it is smaller than the sum of its proper divisors (28513348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21025596 is a wasteful number, since it uses less digits than its factorization.

21025596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17121 (or 17119 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 21025596 is about 4585.3675970417. The cubic root of 21025596 is about 276.0044632759.

The spelling of 21025596 in words is "twenty-one million, twenty-five thousand, five hundred ninety-six".