18197461499 has 8 divisors (see below), whose sum is σ = 20883395808. Its totient is φ = 15533101440.

The previous prime is 18197461483. The next prime is 18197461519. The reversal of 18197461499 is 99416479181.

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 18197461499 - 2⁴ = 18197461483 is a prime.

It is a super-2 number, since 2×18197461499² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18197461439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5391752 + ... + 5395125.

It is an arithmetic number, because the mean of its divisors is an integer number (2610424476).

Almost surely, 2^18197461499 is an apocalyptic number.

18197461499 is a deficient number, since it is larger than the sum of its proper divisors (2685934309).

18197461499 is a wasteful number, since it uses less digits than its factorization.

18197461499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10787125.

The product of its digits is 3919104, while the sum is 59.

The spelling of 18197461499 in words is "eighteen billion, one hundred ninety-seven million, four hundred sixty-one thousand, four hundred ninety-nine".