20188894 has 32 divisors (see below), whose sum is σ = 36516096. Its totient is φ = 8257920.

The previous prime is 20188879. The next prime is 20188907. The reversal of 20188894 is 49888102.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 7429 + ... + 9775.

It is an arithmetic number, because the mean of its divisors is an integer number (1141128).

Almost surely, 2^20188894 is an apocalyptic number.

20188894 is a deficient number, since it is larger than the sum of its proper divisors (16327202).

20188894 is a wasteful number, since it uses less digits than its factorization.

20188894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400.

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 20188894 is about 4493.2053146946. The cubic root of 20188894 is about 272.2936473292.

The spelling of 20188894 in words is "twenty million, one hundred eighty-eight thousand, eight hundred ninety-four".