18881325 has 36 divisors (see below), whose sum is σ = 34922368. Its totient is φ = 9741600.

The previous prime is 18881323. The next prime is 18881329. The reversal of 18881325 is 52318881.

It is not a de Polignac number, because 18881325 - 2¹ = 18881323 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18881325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18881323) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5622 + ... + 8328.

Almost surely, 2^18881325 is an apocalyptic number.

18881325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18881325 is a deficient number, since it is larger than the sum of its proper divisors (16041043).

18881325 is a wasteful number, since it uses less digits than its factorization.

18881325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754 (or 2746 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 18881325 is about 4345.2646639762. The cubic root of 18881325 is about 266.2834382390.

The spelling of 18881325 in words is "eighteen million, eight hundred eighty-one thousand, three hundred twenty-five".