21104632600 has 48 divisors (see below), whose sum is σ = 50651133120. Its totient is φ = 8169532800.

The previous prime is 21104632573. The next prime is 21104632607. The reversal of 21104632600 is 623640112.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104632607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1695787 + ... + 1708186.

It is an arithmetic number, because the mean of its divisors is an integer number (1055231940).

Almost surely, 2^21104632600 is an apocalyptic number.

21104632600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21104632600 is an abundant number, since it is smaller than the sum of its proper divisors (29546500520).

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

21104632600 is a wasteful number, since it uses less digits than its factorization.

21104632600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3404020 (or 3404011 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The spelling of 21104632600 in words is "twenty-one billion, one hundred four million, six hundred thirty-two thousand, six hundred".