21323113200 has 90 divisors (see below), whose sum is σ = 73997138384. Its totient is φ = 5686162560.

The previous prime is 21323113199. The next prime is 21323113211. The reversal of 21323113200 is 231132312.

21323113200 is a `hidden beast` number, since 2 + 1 + 32 + 311 + 320 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (90).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2957944 + ... + 2965143.

Almost surely, 2^21323113200 is an apocalyptic number.

21323113200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21323113200 is an abundant number, since it is smaller than the sum of its proper divisors (52674025184).

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

21323113200 is a wasteful number, since it uses less digits than its factorization.

21323113200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5923111 (or 5923097 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21323113200 its reverse (231132312), we get a palindrome (21554245512).

The spelling of 21323113200 in words is "twenty-one billion, three hundred twenty-three million, one hundred thirteen thousand, two hundred".