18422904361 has 3 divisors (see below), whose sum is σ = 18423040093. Its totient is φ = 18422768630.

The previous prime is 18422904337. The next prime is 18422904377. The reversal of 18422904361 is 16340922481.

The square root of 18422904361 is 135731.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 18422904361 - 2¹³ = 18422896169 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18422904761) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 67866 + ... + 203596.

Almost surely, 2^18422904361 is an apocalyptic number.

18422904361 is the 135731-st square number.

18422904361 is the 67866-th centered octagonal number.

It is an amenable number.

18422904361 is a deficient number, since it is larger than the sum of its proper divisors (135732).

18422904361 is an frugal number, since it uses more digits than its factorization.

18422904361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271462 (or 135731 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 18422904361 in words is "eighteen billion, four hundred twenty-two million, nine hundred four thousand, three hundred sixty-one".