18898512959 has 2 divisors, whose sum is σ = 18898512960. Its totient is φ = 18898512958.

The previous prime is 18898512949. The next prime is 18898512967. The reversal of 18898512959 is 95921589881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18898512959 - 2²⁸ = 18630077503 is a prime.

It is a super-3 number, since 3×18898512959³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 18898512895 and 18898512904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18898512949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9449256479 + 9449256480.

It is an arithmetic number, because the mean of its divisors is an integer number (9449256480).

Almost surely, 2^18898512959 is an apocalyptic number.

18898512959 is a deficient number, since it is larger than the sum of its proper divisors (1).

18898512959 is an equidigital number, since it uses as much as digits as its factorization.

18898512959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18662400, while the sum is 65.

The spelling of 18898512959 in words is "eighteen billion, eight hundred ninety-eight million, five hundred twelve thousand, nine hundred fifty-nine".