18734872 has 32 divisors (see below), whose sum is σ = 38112480. Its totient is φ = 8582400.

The previous prime is 18734861. The next prime is 18734879. The reversal of 18734872 is 27843781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18734879) 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, 15108 + ... + 16300.

It is an arithmetic number, because the mean of its divisors is an integer number (1191015).

Almost surely, 2^18734872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18734872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19056240).

18734872 is an abundant number, since it is smaller than the sum of its proper divisors (19377608).

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

18734872 is a wasteful number, since it uses less digits than its factorization.

18734872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363 (or 1359 counting only the distinct ones).

The product of its digits is 75264, while the sum is 40.

The square root of 18734872 is about 4328.3798354581. The cubic root of 18734872 is about 265.5931746323.

The spelling of 18734872 in words is "eighteen million, seven hundred thirty-four thousand, eight hundred seventy-two".