18797805166 has 16 divisors (see below), whose sum is σ = 32586887520. Its totient is φ = 7965682560.

The previous prime is 18797805163. The next prime is 18797805181. The reversal of 18797805166 is 66150879781.

It is a self number, because there is not a number n which added to its sum of digits gives 18797805166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18797805163) 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, 7542015 + ... + 7544506.

It is an arithmetic number, because the mean of its divisors is an integer number (2036680470).

Almost surely, 2^18797805166 is an apocalyptic number.

18797805166 is a deficient number, since it is larger than the sum of its proper divisors (13789082354).

18797805166 is a wasteful number, since it uses less digits than its factorization.

18797805166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15086619.

The product of its (nonzero) digits is 5080320, while the sum is 58.

The spelling of 18797805166 in words is "eighteen billion, seven hundred ninety-seven million, eight hundred five thousand, one hundred sixty-six".