18898944 has 56 divisors (see below), whose sum is σ = 50459640. Its totient is φ = 6291456.

The previous prime is 18898937. The next prime is 18898961. The reversal of 18898944 is 44989881.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

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, 24192 + ... + 24960.

It is an arithmetic number, because the mean of its divisors is an integer number (901065).

Almost surely, 2^18898944 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 18898944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25229820).

18898944 is an abundant number, since it is smaller than the sum of its proper divisors (31560696).

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

18898944 is an frugal number, since it uses more digits than its factorization.

18898944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798 (or 774 counting only the distinct ones).

The product of its digits is 663552, while the sum is 51.

The square root of 18898944 is about 4347.2915706219. The cubic root of 18898944 is about 266.3662394429.

The spelling of 18898944 in words is "eighteen million, eight hundred ninety-eight thousand, nine hundred forty-four".