18421752 has 32 divisors (see below), whose sum is σ = 46357200. Its totient is φ = 6100224.

The previous prime is 18421723. The next prime is 18421787. The reversal of 18421752 is 25712481.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1324 + ... + 6212.

Almost surely, 2^18421752 is an apocalyptic number.

18421752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18421752 is an abundant number, since it is smaller than the sum of its proper divisors (27935448).

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

18421752 is a wasteful number, since it uses less digits than its factorization.

18421752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5055 (or 5051 counting only the distinct ones).

The product of its digits is 4480, while the sum is 30.

The square root of 18421752 is about 4292.0568495769. The cubic root of 18421752 is about 264.1052151783.

The spelling of 18421752 in words is "eighteen million, four hundred twenty-one thousand, seven hundred fifty-two".