18496971 has 8 divisors (see below), whose sum is σ = 27402960. Its totient is φ = 12331296.

The previous prime is 18496967. The next prime is 18496979. The reversal of 18496971 is 17969481.

It is a happy number.

It is not a de Polignac number, because 18496971 - 2² = 18496967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18496979) 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, 342510 + ... + 342563.

It is an arithmetic number, because the mean of its divisors is an integer number (3425370).

Almost surely, 2^18496971 is an apocalyptic number.

18496971 is a deficient number, since it is larger than the sum of its proper divisors (8905989).

18496971 is an equidigital number, since it uses as much as digits as its factorization.

18496971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685082 (or 685076 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 18496971 is about 4300.8105050095. The cubic root of 18496971 is about 264.4641885090.

The spelling of 18496971 in words is "eighteen million, four hundred ninety-six thousand, nine hundred seventy-one".