18894738 has 8 divisors (see below), whose sum is σ = 37789488. Its totient is φ = 6298244.

The previous prime is 18894713. The next prime is 18894739. The reversal of 18894738 is 83749881.

It is a sphenic number, since it is the product of 3 distinct primes.

18894738 is an admirable number.

It is a super-2 number, since 2×18894738² = 714022248177288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18894739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1574556 + ... + 1574567.

It is an arithmetic number, because the mean of its divisors is an integer number (4723686).

Almost surely, 2^18894738 is an apocalyptic number.

18894738 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18894738 is a wasteful number, since it uses less digits than its factorization.

18894738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3149128.

The product of its digits is 387072, while the sum is 48.

The square root of 18894738 is about 4346.8077942325. The cubic root of 18894738 is about 266.3464778534.

The spelling of 18894738 in words is "eighteen million, eight hundred ninety-four thousand, seven hundred thirty-eight".