18442722945 has 16 divisors (see below), whose sum is σ = 29553014592. Its totient is φ = 9821232960.

The previous prime is 18442722889. The next prime is 18442722959. The reversal of 18442722945 is 54922724481.

It is a happy number.

It is not a de Polignac number, because 18442722945 - 2⁸ = 18442722689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18442722894 and 18442722903.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 920127 + ... + 939956.

It is an arithmetic number, because the mean of its divisors is an integer number (1847063412).

Almost surely, 2^18442722945 is an apocalyptic number.

18442722945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18442722945 is a deficient number, since it is larger than the sum of its proper divisors (11110291647).

18442722945 is a wasteful number, since it uses less digits than its factorization.

18442722945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860752.

The product of its digits is 1290240, while the sum is 48.

The spelling of 18442722945 in words is "eighteen billion, four hundred forty-two million, seven hundred twenty-two thousand, nine hundred forty-five".