18061264 has 40 divisors (see below), whose sum is σ = 38247552. Its totient is φ = 8211840.

The previous prime is 18061249. The next prime is 18061271. The reversal of 18061264 is 46216081.

It is a Smith number, since the sum of its digits (28) 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 7 ways as a sum of consecutive naturals, for example, 14157 + ... + 15379.

Almost surely, 2^18061264 is an apocalyptic number.

18061264 is the 2272-nd nonagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18061264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19123776).

18061264 is an abundant number, since it is smaller than the sum of its proper divisors (20186288).

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

18061264 is a wasteful number, since it uses less digits than its factorization.

18061264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315 (or 1309 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 18061264 is about 4249.8545857476. The cubic root of 18061264 is about 262.3711306976.

The spelling of 18061264 in words is "eighteen million, sixty-one thousand, two hundred sixty-four".