18452230991 has 2 divisors, whose sum is σ = 18452230992. Its totient is φ = 18452230990.

The previous prime is 18452230963. The next prime is 18452231023. The reversal of 18452230991 is 19903225481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18452230991 - 2¹⁴ = 18452214607 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18452230091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9226115495 + 9226115496.

It is an arithmetic number, because the mean of its divisors is an integer number (9226115496).

Almost surely, 2^18452230991 is an apocalyptic number.

18452230991 is a deficient number, since it is larger than the sum of its proper divisors (1).

18452230991 is an equidigital number, since it uses as much as digits as its factorization.

18452230991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 18452230991 in words is "eighteen billion, four hundred fifty-two million, two hundred thirty thousand, nine hundred ninety-one".