21242525552 has 20 divisors (see below), whose sum is σ = 41161170576. Its totient is φ = 10620288000.

The previous prime is 21242525543. The next prime is 21242525561. The reversal of 21242525552 is 25552524212.

It is an interprime number because it is at equal distance from previous prime (21242525543) and next prime (21242525561).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138677 + ... + 248427.

Almost surely, 2^21242525552 is an apocalyptic number.

It is an amenable number.

21242525552 is a deficient number, since it is larger than the sum of its proper divisors (19918645024).

21242525552 is a wasteful number, since it uses less digits than its factorization.

21242525552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121856 (or 121850 counting only the distinct ones).

The product of its digits is 80000, while the sum is 35.

The spelling of 21242525552 in words is "twenty-one billion, two hundred forty-two million, five hundred twenty-five thousand, five hundred fifty-two".