20557194 has 16 divisors (see below), whose sum is σ = 46987968. Its totient is φ = 5873472.

The previous prime is 20557181. The next prime is 20557211. The reversal of 20557194 is 49175502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244687 + ... + 244770.

It is an arithmetic number, because the mean of its divisors is an integer number (2936748).

Almost surely, 2^20557194 is an apocalyptic number.

20557194 is an abundant number, since it is smaller than the sum of its proper divisors (26430774).

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

20557194 is a wasteful number, since it uses less digits than its factorization.

20557194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489469.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 20557194 is about 4534.0041905583. The cubic root of 20557194 is about 273.9394701748.

The spelling of 20557194 in words is "twenty million, five hundred fifty-seven thousand, one hundred ninety-four".