18964873 has 2 divisors, whose sum is σ = 18964874. Its totient is φ = 18964872.

The previous prime is 18964859. The next prime is 18964879. The reversal of 18964873 is 37846981.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18731584 + 233289 = 4328^2 + 483^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18964873 is a prime.

It is a super-2 number, since 2×18964873² = 719332815812258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18964879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9482436 + 9482437.

It is an arithmetic number, because the mean of its divisors is an integer number (9482437).

Almost surely, 2^18964873 is an apocalyptic number.

It is an amenable number.

18964873 is a deficient number, since it is larger than the sum of its proper divisors (1).

18964873 is an equidigital number, since it uses as much as digits as its factorization.

18964873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 18964873 is about 4354.8677362235. The cubic root of 18964873 is about 266.6756196647.

The spelling of 18964873 in words is "eighteen million, nine hundred sixty-four thousand, eight hundred seventy-three".