18739452 has 24 divisors (see below), whose sum is σ = 45234000. Its totient is φ = 6030976.

The previous prime is 18739451. The next prime is 18739459. The reversal of 18739452 is 25493781.

It is a super-2 number, since 2×18739452² = 702334122520608, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18739452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18739451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26577 + ... + 27272.

It is an arithmetic number, because the mean of its divisors is an integer number (1884750).

Almost surely, 2^18739452 is an apocalyptic number.

18739452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18739452 is an abundant number, since it is smaller than the sum of its proper divisors (26494548).

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

18739452 is a wasteful number, since it uses less digits than its factorization.

18739452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53885 (or 53883 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 18739452 is about 4328.9088694497. The cubic root of 18739452 is about 265.6148155172.

It can be divided in two parts, 18739 and 452, that added together give a palindrome (19191).

The spelling of 18739452 in words is "eighteen million, seven hundred thirty-nine thousand, four hundred fifty-two".