18289039478 has 4 divisors (see below), whose sum is σ = 27433559220. Its totient is φ = 9144519738.

The previous prime is 18289039469. The next prime is 18289039481. The reversal of 18289039478 is 87493098281.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4572259868 + ... + 4572259871.

It is an arithmetic number, because the mean of its divisors is an integer number (6858389805).

Almost surely, 2^18289039478 is an apocalyptic number.

18289039478 is a deficient number, since it is larger than the sum of its proper divisors (9144519742).

18289039478 is an equidigital number, since it uses as much as digits as its factorization.

18289039478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9144519741.

The product of its (nonzero) digits is 6967296, while the sum is 59.

It can be divided in two parts, 1828903 and 9478, that added together give a palindrome (1838381).

The spelling of 18289039478 in words is "eighteen billion, two hundred eighty-nine million, thirty-nine thousand, four hundred seventy-eight".