18741872 has 20 divisors (see below), whose sum is σ = 37891920. Its totient is φ = 8963328.

The previous prime is 18741839. The next prime is 18741883. The reversal of 18741872 is 27814781.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25097 + ... + 25832.

It is an arithmetic number, because the mean of its divisors is an integer number (1894596).

Almost surely, 2^18741872 is an apocalyptic number.

It is an amenable number.

18741872 is an abundant number, since it is smaller than the sum of its proper divisors (19150048).

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

18741872 is a wasteful number, since it uses less digits than its factorization.

18741872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50960 (or 50954 counting only the distinct ones).

The product of its digits is 25088, while the sum is 38.

The square root of 18741872 is about 4329.1883765898. The cubic root of 18741872 is about 265.6262487969.

The spelling of 18741872 in words is "eighteen million, seven hundred forty-one thousand, eight hundred seventy-two".