20999083756 has 24 divisors (see below), whose sum is σ = 42024071936. Its totient is φ = 8994056400.

The previous prime is 20999083739. The next prime is 20999083771. The reversal of 20999083756 is 65738099902.

It is a self number, because there is not a number n which added to its sum of digits gives 20999083756.

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, 184920 + ... + 276031.

Almost surely, 2^20999083756 is an apocalyptic number.

It is an amenable number.

20999083756 is an abundant number, since it is smaller than the sum of its proper divisors (21024988180).

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

20999083756 is a wasteful number, since it uses less digits than its factorization.

20999083756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462589 (or 462587 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 58.

The spelling of 20999083756 in words is "twenty billion, nine hundred ninety-nine million, eighty-three thousand, seven hundred fifty-six".