18813450 has 24 divisors (see below), whose sum is σ = 46657728. Its totient is φ = 5016880.

The previous prime is 18813449. The next prime is 18813451. The reversal of 18813450 is 5431881.

It is an interprime number because it is at equal distance from previous prime (18813449) and next prime (18813451).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (18813451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62562 + ... + 62861.

It is an arithmetic number, because the mean of its divisors is an integer number (1944072).

Almost surely, 2^18813450 is an apocalyptic number.

18813450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18813450 is an abundant number, since it is smaller than the sum of its proper divisors (27844278).

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

18813450 is a wasteful number, since it uses less digits than its factorization.

18813450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125438 (or 125433 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 18813450 is about 4337.4474060212. The cubic root of 18813450 is about 265.9639746188.

The spelling of 18813450 in words is "eighteen million, eight hundred thirteen thousand, four hundred fifty".