18988450 has 48 divisors (see below), whose sum is σ = 38497536. Its totient is φ = 6926400.

The previous prime is 18988421. The next prime is 18988471. The reversal of 18988450 is 5488981.

It is a super-2 number, since 2×18988450² = 721122466805000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18988397 and 18988406.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85039 + ... + 85261.

It is an arithmetic number, because the mean of its divisors is an integer number (802032).

Almost surely, 2^18988450 is an apocalyptic number.

18988450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18988450 is an abundant number, since it is smaller than the sum of its proper divisors (19509086).

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

18988450 is a wasteful number, since it uses less digits than its factorization.

18988450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 43.

The square root of 18988450 is about 4357.5738662701. The cubic root of 18988450 is about 266.7860836682.

The spelling of 18988450 in words is "eighteen million, nine hundred eighty-eight thousand, four hundred fifty".