18274944 has 32 divisors (see below), whose sum is σ = 48543840. Its totient is φ = 6091520.

The previous prime is 18274943. The next prime is 18274951. The reversal of 18274944 is 44947281.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18274943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23412 + ... + 24179.

It is an arithmetic number, because the mean of its divisors is an integer number (1516995).

Almost surely, 2^18274944 is an apocalyptic number.

It is an amenable number.

18274944 is an abundant number, since it is smaller than the sum of its proper divisors (30268896).

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

18274944 is an equidigital number, since it uses as much as digits as its factorization.

18274944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47608 (or 47596 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 18274944 is about 4274.9203501352. The cubic root of 18274944 is about 263.4017675404.

The spelling of 18274944 in words is "eighteen million, two hundred seventy-four thousand, nine hundred forty-four".