20971533312 has 88 divisors (see below), whose sum is σ = 62107617600. Its totient is φ = 6990501888.

The previous prime is 20971533301. The next prime is 20971533343. The reversal of 20971533312 is 21333517902.

It is a happy number.

20971533312 is a `hidden beast` number, since 2 + 0 + 97 + 1 + 533 + 31 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351612 + ... + 406907.

Almost surely, 2^20971533312 is an apocalyptic number.

It is an amenable number.

20971533312 is an abundant number, since it is smaller than the sum of its proper divisors (41136084288).

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

20971533312 is an equidigital number, since it uses as much as digits as its factorization.

20971533312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758548 (or 758524 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The spelling of 20971533312 in words is "twenty billion, nine hundred seventy-one million, five hundred thirty-three thousand, three hundred twelve".