18461197 has 8 divisors (see below), whose sum is σ = 19164600. Its totient is φ = 17762304.

The previous prime is 18461171. The next prime is 18461227. The reversal of 18461197 is 79116481.

It can be written as a sum of positive squares in 4 ways, for example, as 1371241 + 17089956 = 1171^2 + 4134^2 .

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 18461197 - 2¹⁹ = 17936909 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 (18461117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8829 + ... + 10717.

It is an arithmetic number, because the mean of its divisors is an integer number (2395575).

Almost surely, 2^18461197 is an apocalyptic number.

It is an amenable number.

18461197 is a deficient number, since it is larger than the sum of its proper divisors (703403).

18461197 is a wasteful number, since it uses less digits than its factorization.

18461197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2255.

The product of its digits is 12096, while the sum is 37.

The square root of 18461197 is about 4296.6495086288. The cubic root of 18461197 is about 264.2935831390.

The spelling of 18461197 in words is "eighteen million, four hundred sixty-one thousand, one hundred ninety-seven".