18984749074 has 4 divisors (see below), whose sum is σ = 28477123614. Its totient is φ = 9492374536.

The previous prime is 18984749071. The next prime is 18984749093. The reversal of 18984749074 is 47094748981.

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., 18984706225 + 42849 = 137785^2 + 207^2 .

It is not an unprimeable number, because it can be changed into a prime (18984749071) 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, 4746187267 + ... + 4746187270.

Almost surely, 2^18984749074 is an apocalyptic number.

18984749074 is a deficient number, since it is larger than the sum of its proper divisors (9492374540).

18984749074 is an equidigital number, since it uses as much as digits as its factorization.

18984749074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9492374539.

The product of its (nonzero) digits is 16257024, while the sum is 61.

The spelling of 18984749074 in words is "eighteen billion, nine hundred eighty-four million, seven hundred forty-nine thousand, seventy-four".