21312132000 has 96 divisors (see below), whose sum is σ = 69818583744. Its totient is φ = 5683232000.

The previous prime is 21312131969. The next prime is 21312132029. The reversal of 21312132000 is 23121312.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 876006 + ... + 900005.

It is an arithmetic number, because the mean of its divisors is an integer number (727276914).

Almost surely, 2^21312132000 is an apocalyptic number.

21312132000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21312132000 is an abundant number, since it is smaller than the sum of its proper divisors (48506451744).

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

21312132000 is a wasteful number, since it uses less digits than its factorization.

21312132000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776039 (or 1776021 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21312132000 its reverse (23121312), we get a palindrome (21335253312).

The spelling of 21312132000 in words is "twenty-one billion, three hundred twelve million, one hundred thirty-two thousand".