18274464 has 96 divisors (see below), whose sum is σ = 57435840. Its totient is φ = 5619456.

The previous prime is 18274463. The next prime is 18274513. The reversal of 18274464 is 46447281.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18274463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10419 + ... + 12045.

It is an arithmetic number, because the mean of its divisors is an integer number (598290).

Almost surely, 2^18274464 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 18274464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28717920).

18274464 is an abundant number, since it is smaller than the sum of its proper divisors (39161376).

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

18274464 is a wasteful number, since it uses less digits than its factorization.

18274464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659 (or 1645 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 18274464 is about 4274.8642083697. The cubic root of 18274464 is about 263.3994613965.

The spelling of 18274464 in words is "eighteen million, two hundred seventy-four thousand, four hundred sixty-four".