21332631785472 has 260 divisors, whose sum is σ = 72830578715136. Its totient is φ = 6095036989440.

The previous prime is 21332631785459. The next prime is 21332631785477. The reversal of 21332631785472 is 27458713623312.

It is a happy number.

21332631785472 is a `hidden beast` number, since 2 + 1 + 3 + 3 + 26 + 3 + 1 + 78 + 547 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (21332631785477) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2270304 + ... + 6915167.

Almost surely, 2^{21332631785472} is an apocalyptic number.

It is an amenable number.

21332631785472 is an abundant number, since it is smaller than the sum of its proper divisors (51497946929664).

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

21332631785472 is an frugal number, since it uses more digits than its factorization.

21332631785472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9185514 (or 9185483 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 54.

The spelling of 21332631785472 in words is "twenty-one trillion, three hundred thirty-two billion, six hundred thirty-one million, seven hundred eighty-five thousand, four hundred seventy-two".