18694369 has 2 divisors, whose sum is σ = 18694370. Its totient is φ = 18694368.

The previous prime is 18694363. The next prime is 18694399. The reversal of 18694369 is 96349681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10497600 + 8196769 = 3240^2 + 2863^2 .

It is a cyclic number.

It is not a de Polignac number, because 18694369 - 2¹⁷ = 18563297 is a prime.

It is a super-2 number, since 2×18694369² = 698958864616322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18694363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9347184 + 9347185.

It is an arithmetic number, because the mean of its divisors is an integer number (9347185).

Almost surely, 2^18694369 is an apocalyptic number.

It is an amenable number.

18694369 is a deficient number, since it is larger than the sum of its proper divisors (1).

18694369 is an equidigital number, since it uses as much as digits as its factorization.

18694369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 46.

The square root of 18694369 is about 4323.6985325066. The cubic root of 18694369 is about 265.4016408662.

The spelling of 18694369 in words is "eighteen million, six hundred ninety-four thousand, three hundred sixty-nine".