20983156 has 12 divisors (see below), whose sum is σ = 37905280. Its totient is φ = 10153080.

The previous prime is 20983141. The next prime is 20983159. The reversal of 20983156 is 65138902.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20983159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84486 + ... + 84733.

Almost surely, 2^20983156 is an apocalyptic number.

It is an amenable number.

20983156 is a deficient number, since it is larger than the sum of its proper divisors (16922124).

20983156 is a wasteful number, since it uses less digits than its factorization.

20983156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169254 (or 169252 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 20983156 is about 4580.7374952075. The cubic root of 20983156 is about 275.8186339093.

The spelling of 20983156 in words is "twenty million, nine hundred eighty-three thousand, one hundred fifty-six".