18980171 has 12 divisors (see below), whose sum is σ = 22247376. Its totient is φ = 15862080.

The previous prime is 18980167. The next prime is 18980231. The reversal of 18980171 is 17108981.

It is not a de Polignac number, because 18980171 - 2² = 18980167 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18980141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10961 + ... + 12573.

It is an arithmetic number, because the mean of its divisors is an integer number (1853948).

Almost surely, 2^18980171 is an apocalyptic number.

18980171 is a deficient number, since it is larger than the sum of its proper divisors (3267205).

18980171 is an equidigital number, since it uses as much as digits as its factorization.

18980171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702 (or 1661 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 35.

The square root of 18980171 is about 4356.6238074913. The cubic root of 18980171 is about 266.7473049533.

The spelling of 18980171 in words is "eighteen million, nine hundred eighty thousand, one hundred seventy-one".