18612797 has 6 divisors (see below), whose sum is σ = 21651678. Its totient is φ = 15953784.

The previous prime is 18612791. The next prime is 18612817. The reversal of 18612797 is 79721681.

It can be written as a sum of positive squares in only one way, i.e., 15476356 + 3136441 = 3934^2 + 1771^2 .

It is not a de Polignac number, because 18612797 - 2⁸ = 18612541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18612791) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 189878 + ... + 189975.

It is an arithmetic number, because the mean of its divisors is an integer number (3608613).

Almost surely, 2^18612797 is an apocalyptic number.

It is an amenable number.

18612797 is a deficient number, since it is larger than the sum of its proper divisors (3038881).

18612797 is an equidigital number, since it uses as much as digits as its factorization.

18612797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379867 (or 379860 counting only the distinct ones).

The product of its digits is 42336, while the sum is 41.

The square root of 18612797 is about 4314.2550921335. The cubic root of 18612797 is about 265.0150555111.

The spelling of 18612797 in words is "eighteen million, six hundred twelve thousand, seven hundred ninety-seven".