18549379 has 2 divisors, whose sum is σ = 18549380. Its totient is φ = 18549378.

The previous prime is 18549371. The next prime is 18549403. The reversal of 18549379 is 97394581.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18549379 - 2³ = 18549371 is a prime.

It is a super-2 number, since 2×18549379² = 688158922571282, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18549371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9274689 + 9274690.

It is an arithmetic number, because the mean of its divisors is an integer number (9274690).

Almost surely, 2^18549379 is an apocalyptic number.

18549379 is a deficient number, since it is larger than the sum of its proper divisors (1).

18549379 is an equidigital number, since it uses as much as digits as its factorization.

18549379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 46.

The square root of 18549379 is about 4306.8990004410. The cubic root of 18549379 is about 264.7137243157.

The spelling of 18549379 in words is "eighteen million, five hundred forty-nine thousand, three hundred seventy-nine".