18904472697 has 32 divisors (see below), whose sum is σ = 27808809984. Its totient is φ = 11327832000.

The previous prime is 18904472647. The next prime is 18904472723. The reversal of 18904472697 is 79627440981.

It is a happy number.

It is not a de Polignac number, because 18904472697 - 2¹⁴ = 18904456313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18904472647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2619468 + ... + 2626674.

It is an arithmetic number, because the mean of its divisors is an integer number (869025312).

Almost surely, 2^18904472697 is an apocalyptic number.

It is an amenable number.

18904472697 is a deficient number, since it is larger than the sum of its proper divisors (8904337287).

18904472697 is a wasteful number, since it uses less digits than its factorization.

18904472697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8109.

The product of its (nonzero) digits is 6096384, while the sum is 57.

The spelling of 18904472697 in words is "eighteen billion, nine hundred four million, four hundred seventy-two thousand, six hundred ninety-seven".