18196497 has 24 divisors (see below), whose sum is σ = 29379168. Its totient is φ = 10756800.

The previous prime is 18196469. The next prime is 18196499. The reversal of 18196497 is 79469181.

It is a happy number.

It is not a de Polignac number, because 18196497 - 2¹⁸ = 17934353 is a prime.

It is a super-2 number, since 2×18196497² = 662225006142018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18196499) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1818 + ... + 6300.

It is an arithmetic number, because the mean of its divisors is an integer number (1224132).

Almost surely, 2^18196497 is an apocalyptic number.

It is an amenable number.

18196497 is a deficient number, since it is larger than the sum of its proper divisors (11182671).

18196497 is a wasteful number, since it uses less digits than its factorization.

18196497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4541 (or 4538 counting only the distinct ones).

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

The square root of 18196497 is about 4265.7352238506. The cubic root of 18196497 is about 263.0243342768.

The spelling of 18196497 in words is "eighteen million, one hundred ninety-six thousand, four hundred ninety-seven".