18340372 has 12 divisors (see below), whose sum is σ = 32427220. Its totient is φ = 9075456.

The previous prime is 18340369. The next prime is 18340373. The reversal of 18340372 is 27304381.

It can be written as a sum of positive squares in 2 ways, for example, as 3083536 + 15256836 = 1756^2 + 3906^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18340372.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18340373) 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, 23247 + ... + 24022.

Almost surely, 2^18340372 is an apocalyptic number.

It is an amenable number.

18340372 is a deficient number, since it is larger than the sum of its proper divisors (14086848).

18340372 is a wasteful number, since it uses less digits than its factorization.

18340372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47370 (or 47368 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 18340372 is about 4282.5660531975. The cubic root of 18340372 is about 263.7157370345.

The spelling of 18340372 in words is "eighteen million, three hundred forty thousand, three hundred seventy-two".