18553164442 has 4 divisors (see below), whose sum is σ = 27829746666. Its totient is φ = 9276582220.

The previous prime is 18553164419. The next prime is 18553164473. The reversal of 18553164442 is 24446135581.

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., 11983899841 + 6569264601 = 109471^2 + 81051^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4638291109 + ... + 4638291112.

Almost surely, 2^18553164442 is an apocalyptic number.

18553164442 is a deficient number, since it is larger than the sum of its proper divisors (9276582224).

18553164442 is an equidigital number, since it uses as much as digits as its factorization.

18553164442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9276582223.

The product of its digits is 460800, while the sum is 43.

The spelling of 18553164442 in words is "eighteen billion, five hundred fifty-three million, one hundred sixty-four thousand, four hundred forty-two".