21525032104 has 16 divisors (see below), whose sum is σ = 40584909600. Its totient is φ = 10702389552.

The previous prime is 21525032099. The next prime is 21525032117. The reversal of 21525032104 is 40123052512.

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, 7514292 + ... + 7517155.

It is an arithmetic number, because the mean of its divisors is an integer number (2536556850).

Almost surely, 2^21525032104 is an apocalyptic number.

It is an amenable number.

21525032104 is a deficient number, since it is larger than the sum of its proper divisors (19059877496).

21525032104 is a wasteful number, since it uses less digits than its factorization.

21525032104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15031632 (or 15031628 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 21525032104 its reverse (40123052512), we get a palindrome (61648084616).

The spelling of 21525032104 in words is "twenty-one billion, five hundred twenty-five million, thirty-two thousand, one hundred four".