18872574 has 16 divisors (see below), whose sum is σ = 43137408. Its totient is φ = 5392152.

The previous prime is 18872573. The next prime is 18872593. The reversal of 18872574 is 47527881.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 449347 = 18872574 / (1 + 8 + 8 + 7 + 2 + 5 + 7 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18872573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224632 + ... + 224715.

It is an arithmetic number, because the mean of its divisors is an integer number (2696088).

Almost surely, 2^18872574 is an apocalyptic number.

18872574 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18872574 is an abundant number, since it is smaller than the sum of its proper divisors (24264834).

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

18872574 is a wasteful number, since it uses less digits than its factorization.

18872574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449359.

The product of its digits is 125440, while the sum is 42.

The square root of 18872574 is about 4344.2575890479. The cubic root of 18872574 is about 266.2422934136.

The spelling of 18872574 in words is "eighteen million, eight hundred seventy-two thousand, five hundred seventy-four".