18850397667 has 8 divisors (see below), whose sum is σ = 26456698560. Its totient is φ = 11905514280.

The previous prime is 18850397651. The next prime is 18850397681. The reversal of 18850397667 is 76679305881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18850397667 - 2⁴ = 18850397651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18850397667.

It is not an unprimeable number, because it can be changed into a prime (18850397617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165354309 + ... + 165354422.

It is an arithmetic number, because the mean of its divisors is an integer number (3307087320).

Almost surely, 2^18850397667 is an apocalyptic number.

18850397667 is a deficient number, since it is larger than the sum of its proper divisors (7606300893).

18850397667 is a wasteful number, since it uses less digits than its factorization.

18850397667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330708753.

The product of its (nonzero) digits is 15240960, while the sum is 60.

The spelling of 18850397667 in words is "eighteen billion, eight hundred fifty million, three hundred ninety-seven thousand, six hundred sixty-seven".