18107220961 has 8 divisors (see below), whose sum is σ = 18351774720. Its totient is φ = 17864260848.

The previous prime is 18107220959. The next prime is 18107221001. The reversal of 18107220961 is 16902270181.

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

It is a cyclic number.

It is not a de Polignac number, because 18107220961 - 2¹ = 18107220959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18107220961.

It is not an unprimeable number, because it can be changed into a prime (18107220161) 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, 375526 + ... + 420991.

It is an arithmetic number, because the mean of its divisors is an integer number (2293971840).

Almost surely, 2^18107220961 is an apocalyptic number.

It is an amenable number.

18107220961 is a deficient number, since it is larger than the sum of its proper divisors (244553759).

18107220961 is a wasteful number, since it uses less digits than its factorization.

18107220961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796823.

The product of its (nonzero) digits is 12096, while the sum is 37.

The spelling of 18107220961 in words is "eighteen billion, one hundred seven million, two hundred twenty thousand, nine hundred sixty-one".