18794539 has 2 divisors, whose sum is σ = 18794540. Its totient is φ = 18794538.

The previous prime is 18794491. The next prime is 18794551. The reversal of 18794539 is 93549781.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18794539 - 2⁷ = 18794411 is a prime.

It is not a weakly prime, because it can be changed into another prime (18794579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9397269 + 9397270.

It is an arithmetic number, because the mean of its divisors is an integer number (9397270).

Almost surely, 2^18794539 is an apocalyptic number.

18794539 is a deficient number, since it is larger than the sum of its proper divisors (1).

18794539 is an equidigital number, since it uses as much as digits as its factorization.

18794539 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 18794539 is about 4335.2668891315. The cubic root of 18794539 is about 265.8748304000.

The spelling of 18794539 in words is "eighteen million, seven hundred ninety-four thousand, five hundred thirty-nine".