18531283399 has 2 divisors, whose sum is σ = 18531283400. Its totient is φ = 18531283398.

The previous prime is 18531283369. The next prime is 18531283409. The reversal of 18531283399 is 99338213581.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18531283399 - 2⁵ = 18531283367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18531283369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9265641699 + 9265641700.

It is an arithmetic number, because the mean of its divisors is an integer number (9265641700).

Almost surely, 2^18531283399 is an apocalyptic number.

18531283399 is a deficient number, since it is larger than the sum of its proper divisors (1).

18531283399 is an equidigital number, since it uses as much as digits as its factorization.

18531283399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 52.

The spelling of 18531283399 in words is "eighteen billion, five hundred thirty-one million, two hundred eighty-three thousand, three hundred ninety-nine".