18881874 has 48 divisors (see below), whose sum is σ = 45601920. Its totient is φ = 5597280.

The previous prime is 18881867. The next prime is 18881909. The reversal of 18881874 is 47818881.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8292 + ... + 10320.

It is an arithmetic number, because the mean of its divisors is an integer number (950040).

Almost surely, 2^18881874 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18881874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22800960).

18881874 is an abundant number, since it is smaller than the sum of its proper divisors (26720046).

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

18881874 is a wasteful number, since it uses less digits than its factorization.

18881874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095 (or 2092 counting only the distinct ones).

The product of its digits is 114688, while the sum is 45.

The square root of 18881874 is about 4345.3278357335. The cubic root of 18881874 is about 266.2860190641.

The spelling of 18881874 in words is "eighteen million, eight hundred eighty-one thousand, eight hundred seventy-four".