18880297 has 2 divisors, whose sum is σ = 18880298. Its totient is φ = 18880296.

The previous prime is 18880241. The next prime is 18880307. The reversal of 18880297 is 79208881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16818201 + 2062096 = 4101^2 + 1436^2 .

It is a cyclic number.

It is not a de Polignac number, because 18880297 - 2¹⁵ = 18847529 is a prime.

It is a super-2 number, since 2×18880297² = 712931229616418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18880207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9440148 + 9440149.

It is an arithmetic number, because the mean of its divisors is an integer number (9440149).

Almost surely, 2^18880297 is an apocalyptic number.

It is an amenable number.

18880297 is a deficient number, since it is larger than the sum of its proper divisors (1).

18880297 is an equidigital number, since it uses as much as digits as its factorization.

18880297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 43.

The square root of 18880297 is about 4345.1463726784. The cubic root of 18880297 is about 266.2786055213.

The spelling of 18880297 in words is "eighteen million, eight hundred eighty thousand, two hundred ninety-seven".