18914530 has 16 divisors (see below), whose sum is σ = 34877304. Its totient is φ = 7381120.

The previous prime is 18914521. The next prime is 18914531. The reversal of 18914530 is 3541981.

It can be written as a sum of positive squares in 4 ways, for example, as 11068929 + 7845601 = 3327^2 + 2801^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18914492 and 18914501.

It is not an unprimeable number, because it can be changed into a prime (18914531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22657 + ... + 23476.

Almost surely, 2^18914530 is an apocalyptic number.

18914530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18914530 is a deficient number, since it is larger than the sum of its proper divisors (15962774).

18914530 is a wasteful number, since it uses less digits than its factorization.

18914530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46181.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 18914530 is about 4349.0838115631. The cubic root of 18914530 is about 266.4394435941.

The spelling of 18914530 in words is "eighteen million, nine hundred fourteen thousand, five hundred thirty".