20983667136 has 28 divisors (see below), whose sum is σ = 55519286472. Its totient is φ = 6994555648.

The previous prime is 20983667101. The next prime is 20983667179. The reversal of 20983667136 is 63176638902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54644775 + ... + 54645158.

Almost surely, 2^20983667136 is an apocalyptic number.

It is an amenable number.

20983667136 is an abundant number, since it is smaller than the sum of its proper divisors (34535619336).

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

20983667136 is a wasteful number, since it uses less digits than its factorization.

20983667136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109289948 (or 109289938 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 51.

The spelling of 20983667136 in words is "twenty billion, nine hundred eighty-three million, six hundred sixty-seven thousand, one hundred thirty-six".