18419457946 has 4 divisors (see below), whose sum is σ = 27629186922. Its totient is φ = 9209728972.

The previous prime is 18419457923. The next prime is 18419457997. The reversal of 18419457946 is 64975491481.

It is a happy number.

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., 17014332721 + 1405125225 = 130439^2 + 37485^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4604864485 + ... + 4604864488.

Almost surely, 2^18419457946 is an apocalyptic number.

18419457946 is a deficient number, since it is larger than the sum of its proper divisors (9209728976).

18419457946 is an equidigital number, since it uses as much as digits as its factorization.

18419457946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9209728975.

The product of its digits is 8709120, while the sum is 58.

The spelling of 18419457946 in words is "eighteen billion, four hundred nineteen million, four hundred fifty-seven thousand, nine hundred forty-six".