18665490794 has 32 divisors (see below), whose sum is σ = 29891566080. Its totient is φ = 8721108352.

The previous prime is 18665490791. The next prime is 18665490797. The reversal of 18665490794 is 49709456681.

It is an interprime number because it is at equal distance from previous prime (18665490791) and next prime (18665490797).

It is not an unprimeable number, because it can be changed into a prime (18665490791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1222592 + ... + 1237764.

It is an arithmetic number, because the mean of its divisors is an integer number (934111440).

Almost surely, 2^18665490794 is an apocalyptic number.

18665490794 is a deficient number, since it is larger than the sum of its proper divisors (11226075286).

18665490794 is a wasteful number, since it uses less digits than its factorization.

18665490794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15814.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The spelling of 18665490794 in words is "eighteen billion, six hundred sixty-five million, four hundred ninety thousand, seven hundred ninety-four".