20957194 has 4 divisors (see below), whose sum is σ = 31435794. Its totient is φ = 10478596.

The previous prime is 20957177. The next prime is 20957219. The reversal of 20957194 is 49175902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20930625 + 26569 = 4575^2 + 163^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5239297 + ... + 5239300.

Almost surely, 2^20957194 is an apocalyptic number.

20957194 is a deficient number, since it is larger than the sum of its proper divisors (10478600).

20957194 is a wasteful number, since it uses less digits than its factorization.

20957194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10478599.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 20957194 is about 4577.9027949488. The cubic root of 20957194 is about 275.7048321738.

The spelling of 20957194 in words is "twenty million, nine hundred fifty-seven thousand, one hundred ninety-four".