18979142 has 16 divisors (see below), whose sum is σ = 35038752. Its totient is φ = 7508160.

The previous prime is 18979133. The next prime is 18979153. The reversal of 18979142 is 24197981.

It is a self number, because there is not a number n which added to its sum of digits gives 18979142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51959 + ... + 52322.

It is an arithmetic number, because the mean of its divisors is an integer number (2189922).

Almost surely, 2^18979142 is an apocalyptic number.

18979142 is a deficient number, since it is larger than the sum of its proper divisors (16059610).

18979142 is a wasteful number, since it uses less digits than its factorization.

18979142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104303.

The product of its digits is 36288, while the sum is 41.

The square root of 18979142 is about 4356.5057098551. The cubic root of 18979142 is about 266.7424843445.

The spelling of 18979142 in words is "eighteen million, nine hundred seventy-nine thousand, one hundred forty-two".