18989234074 has 4 divisors (see below), whose sum is σ = 28483851114. Its totient is φ = 9494617036.

The previous prime is 18989234063. The next prime is 18989234129. The reversal of 18989234074 is 47043298981.

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., 18600868225 + 388365849 = 136385^2 + 19707^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4747308517 + ... + 4747308520.

Almost surely, 2^18989234074 is an apocalyptic number.

18989234074 is a deficient number, since it is larger than the sum of its proper divisors (9494617040).

18989234074 is an equidigital number, since it uses as much as digits as its factorization.

18989234074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9494617039.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 18989234074 in words is "eighteen billion, nine hundred eighty-nine million, two hundred thirty-four thousand, seventy-four".