18959431151 has 2 divisors, whose sum is σ = 18959431152. Its totient is φ = 18959431150.

The previous prime is 18959431133. The next prime is 18959431163. The reversal of 18959431151 is 15113495981.

It is a strong prime.

It is an emirp because it is prime and its reverse (15113495981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18959431151 - 2⁶ = 18959431087 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18959431096 and 18959431105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18959431651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9479715575 + 9479715576.

It is an arithmetic number, because the mean of its divisors is an integer number (9479715576).

Almost surely, 2^18959431151 is an apocalyptic number.

18959431151 is a deficient number, since it is larger than the sum of its proper divisors (1).

18959431151 is an equidigital number, since it uses as much as digits as its factorization.

18959431151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 47.

The spelling of 18959431151 in words is "eighteen billion, nine hundred fifty-nine million, four hundred thirty-one thousand, one hundred fifty-one".