18455570959 has 4 divisors (see below), whose sum is σ = 21092081104. Its totient is φ = 15819060816.

The previous prime is 18455570929. The next prime is 18455571023. The reversal of 18455570959 is 95907555481.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18455570959 - 2⁷ = 18455570831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18455570909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1318255062 + ... + 1318255075.

It is an arithmetic number, because the mean of its divisors is an integer number (5273020276).

Almost surely, 2^18455570959 is an apocalyptic number.

18455570959 is a deficient number, since it is larger than the sum of its proper divisors (2636510145).

18455570959 is an equidigital number, since it uses as much as digits as its factorization.

18455570959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2636510144.

The product of its (nonzero) digits is 11340000, while the sum is 58.

The spelling of 18455570959 in words is "eighteen billion, four hundred fifty-five million, five hundred seventy thousand, nine hundred fifty-nine".