18258500441 has 2 divisors, whose sum is σ = 18258500442. Its totient is φ = 18258500440.

The previous prime is 18258500401. The next prime is 18258500453. The reversal of 18258500441 is 14400585281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18234451225 + 24049216 = 135035^2 + 4904^2 .

It is a cyclic number.

It is not a de Polignac number, because 18258500441 - 2²⁶ = 18191391577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18258500395 and 18258500404.

It is not a weakly prime, because it can be changed into another prime (18258500401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9129250220 + 9129250221.

It is an arithmetic number, because the mean of its divisors is an integer number (9129250221).

Almost surely, 2^18258500441 is an apocalyptic number.

It is an amenable number.

18258500441 is a deficient number, since it is larger than the sum of its proper divisors (1).

18258500441 is an equidigital number, since it uses as much as digits as its factorization.

18258500441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51200, while the sum is 38.

The spelling of 18258500441 in words is "eighteen billion, two hundred fifty-eight million, five hundred thousand, four hundred forty-one".