18196697 has 4 divisors (see below), whose sum is σ = 18619920. Its totient is φ = 17773476.

The previous prime is 18196691. The next prime is 18196709. The reversal of 18196697 is 79669181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18196697 - 2⁸ = 18196441 is a prime.

It is a super-2 number, since 2×18196697² = 662239563419618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18196691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211547 + ... + 211632.

It is an arithmetic number, because the mean of its divisors is an integer number (4654980).

Almost surely, 2^18196697 is an apocalyptic number.

It is an amenable number.

18196697 is a deficient number, since it is larger than the sum of its proper divisors (423223).

18196697 is an equidigital number, since it uses as much as digits as its factorization.

18196697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423222.

The product of its digits is 163296, while the sum is 47.

The square root of 18196697 is about 4265.7586664039. The cubic root of 18196697 is about 263.0252979178.

The spelling of 18196697 in words is "eighteen million, one hundred ninety-six thousand, six hundred ninety-seven".