21300017532 has 12 divisors (see below), whose sum is σ = 49700040936. Its totient is φ = 7100005840.

The previous prime is 21300017477. The next prime is 21300017549. The reversal of 21300017532 is 23571000312.

It is a tau number, because it is divible by the number of its divisors (12).

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, 887500719 + ... + 887500742.

It is an arithmetic number, because the mean of its divisors is an integer number (4141670078).

Almost surely, 2^21300017532 is an apocalyptic number.

It is an amenable number.

21300017532 is an abundant number, since it is smaller than the sum of its proper divisors (28400023404).

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

21300017532 is a wasteful number, since it uses less digits than its factorization.

21300017532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775001468 (or 1775001466 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

Adding to 21300017532 its reverse (23571000312), we get a palindrome (44871017844).

The spelling of 21300017532 in words is "twenty-one billion, three hundred million, seventeen thousand, five hundred thirty-two".