20144858 has 16 divisors (see below), whose sum is σ = 31618944. Its totient is φ = 9615840.

The previous prime is 20144857. The next prime is 20144869. The reversal of 20144858 is 85844102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20144857) by changing a digit.

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, 1241 + ... + 6467.

It is an arithmetic number, because the mean of its divisors is an integer number (1976184).

Almost surely, 2^20144858 is an apocalyptic number.

20144858 is a deficient number, since it is larger than the sum of its proper divisors (11474086).

20144858 is a wasteful number, since it uses less digits than its factorization.

20144858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5317.

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 20144858 is about 4488.3023516693. The cubic root of 20144858 is about 272.0955276487.

The spelling of 20144858 in words is "twenty million, one hundred forty-four thousand, eight hundred fifty-eight".