21332130912 has 36 divisors (see below), whose sum is σ = 60663248100. Its totient is φ = 7110710208.

The previous prime is 21332130899. The next prime is 21332130913. The reversal of 21332130912 is 21903123312.

21332130912 is a `hidden beast` number, since 21 + 3 + 321 + 309 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21332130913) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37034662 + ... + 37035237.

It is an arithmetic number, because the mean of its divisors is an integer number (1685090225).

Almost surely, 2^21332130912 is an apocalyptic number.

It is an amenable number.

21332130912 is an abundant number, since it is smaller than the sum of its proper divisors (39331117188).

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

21332130912 is a wasteful number, since it uses less digits than its factorization.

21332130912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74069915 (or 74069904 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The spelling of 21332130912 in words is "twenty-one billion, three hundred thirty-two million, one hundred thirty thousand, nine hundred twelve".