18816980597 has 2 divisors, whose sum is σ = 18816980598. Its totient is φ = 18816980596.

The previous prime is 18816980549. The next prime is 18816980641. The reversal of 18816980597 is 79508961881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15023159761 + 3793820836 = 122569^2 + 61594^2 .

It is a cyclic number.

It is not a de Polignac number, because 18816980597 - 2¹⁴ = 18816964213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18816980797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9408490298 + 9408490299.

It is an arithmetic number, because the mean of its divisors is an integer number (9408490299).

Almost surely, 2^18816980597 is an apocalyptic number.

It is an amenable number.

18816980597 is a deficient number, since it is larger than the sum of its proper divisors (1).

18816980597 is an equidigital number, since it uses as much as digits as its factorization.

18816980597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8709120, while the sum is 62.

The spelling of 18816980597 in words is "eighteen billion, eight hundred sixteen million, nine hundred eighty thousand, five hundred ninety-seven".