21300232636 has 24 divisors (see below), whose sum is σ = 37604541744. Its totient is φ = 10556451840.

The previous prime is 21300232607. The next prime is 21300232669. The reversal of 21300232636 is 63623200312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182556 + ... + 275548.

It is an arithmetic number, because the mean of its divisors is an integer number (1566855906).

Almost surely, 2^21300232636 is an apocalyptic number.

It is an amenable number.

21300232636 is a deficient number, since it is larger than the sum of its proper divisors (16304309108).

21300232636 is a wasteful number, since it uses less digits than its factorization.

21300232636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93501 (or 93499 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 21300232636 its reverse (63623200312), we get a palindrome (84923432948).

The spelling of 21300232636 in words is "twenty-one billion, three hundred million, two hundred thirty-two thousand, six hundred thirty-six".