18197023 has 8 divisors (see below), whose sum is σ = 19687808. Its totient is φ = 16719264.

The previous prime is 18197009. The next prime is 18197051. The reversal of 18197023 is 32079181.

18197023 = T₃₂ + T₃₃ + ... + T₄₇₇.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18197023 - 2¹³ = 18188831 is a prime.

It is a super-2 number, since 2×18197023² = 662263292125058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18197063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240 + ... + 6037.

It is an arithmetic number, because the mean of its divisors is an integer number (2460976).

Almost surely, 2^18197023 is an apocalyptic number.

18197023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18197023 is a deficient number, since it is larger than the sum of its proper divisors (1490785).

18197023 is a wasteful number, since it uses less digits than its factorization.

18197023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6513.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 18197023 is about 4265.7968774896. The cubic root of 18197023 is about 263.0268686376.

The spelling of 18197023 in words is "eighteen million, one hundred ninety-seven thousand, twenty-three".