18946797 has 16 divisors (see below), whose sum is σ = 26718720. Its totient is φ = 11923200.

The previous prime is 18946793. The next prime is 18946799. The reversal of 18946797 is 79764981.

It is not a de Polignac number, because 18946797 - 2² = 18946793 is a prime.

It is a super-2 number, since 2×18946797² = 717962233118418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18946793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1329 + ... + 6297.

It is an arithmetic number, because the mean of its divisors is an integer number (1669920).

Almost surely, 2^18946797 is an apocalyptic number.

It is an amenable number.

18946797 is a deficient number, since it is larger than the sum of its proper divisors (7771923).

18946797 is a wasteful number, since it uses less digits than its factorization.

18946797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5044.

The product of its digits is 762048, while the sum is 51.

The square root of 18946797 is about 4352.7918627015. The cubic root of 18946797 is about 266.5908671715.

The spelling of 18946797 in words is "eighteen million, nine hundred forty-six thousand, seven hundred ninety-seven".