18339672 has 64 divisors (see below), whose sum is σ = 50561280. Its totient is φ = 5507712.

The previous prime is 18339653. The next prime is 18339677. The reversal of 18339672 is 27693381.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 18339672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18339677) 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, 12733 + ... + 14099.

It is an arithmetic number, because the mean of its divisors is an integer number (790020).

Almost surely, 2^18339672 is an apocalyptic number.

18339672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18339672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25280640).

18339672 is an abundant number, since it is smaller than the sum of its proper divisors (32221608).

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

18339672 is a wasteful number, since it uses less digits than its factorization.

18339672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432 (or 1428 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 18339672 is about 4282.4843257156. The cubic root of 18339672 is about 263.7123818978.

The spelling of 18339672 in words is "eighteen million, three hundred thirty-nine thousand, six hundred seventy-two".