18422600642 has 4 divisors (see below), whose sum is σ = 27633900966. Its totient is φ = 9211300320.

The previous prime is 18422600641. The next prime is 18422600701. The reversal of 18422600642 is 24600622481.

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

It can be written as a sum of positive squares in only one way, i.e., 12124432321 + 6298168321 = 110111^2 + 79361^2 .

It is not an unprimeable number, because it can be changed into a prime (18422600641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4605650159 + ... + 4605650162.

Almost surely, 2^18422600642 is an apocalyptic number.

18422600642 is a deficient number, since it is larger than the sum of its proper divisors (9211300324).

18422600642 is an equidigital number, since it uses as much as digits as its factorization.

18422600642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9211300323.

The product of its (nonzero) digits is 36864, while the sum is 35.

The spelling of 18422600642 in words is "eighteen billion, four hundred twenty-two million, six hundred thousand, six hundred forty-two".