18638752 has 24 divisors (see below), whose sum is σ = 40031712. Its totient is φ = 8472000.

The previous prime is 18638747. The next prime is 18638759. The reversal of 18638752 is 25783681.

It is a super-2 number, since 2×18638752² = 694806152235008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18638759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26124 + ... + 26827.

It is an arithmetic number, because the mean of its divisors is an integer number (1667988).

Almost surely, 2^18638752 is an apocalyptic number.

It is an amenable number.

18638752 is an abundant number, since it is smaller than the sum of its proper divisors (21392960).

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

18638752 is a wasteful number, since it uses less digits than its factorization.

18638752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52972 (or 52964 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 18638752 is about 4317.2620953563. The cubic root of 18638752 is about 265.1381835390.

Subtracting 18638752 from its reverse (25783681), we obtain a square (7144929 = 2673²).

The spelling of 18638752 in words is "eighteen million, six hundred thirty-eight thousand, seven hundred fifty-two".