18417241899 has 24 divisors (see below), whose sum is σ = 32003229440. Its totient is φ = 9970235568.

The previous prime is 18417241889. The next prime is 18417241919. The reversal of 18417241899 is 99814271481.

It is not a de Polignac number, because 18417241899 - 2¹¹ = 18417239851 is a prime.

It is a super-2 number, since 2×18417241899² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18417241849) 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, 7691887 + ... + 7694280.

Almost surely, 2^18417241899 is an apocalyptic number.

18417241899 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18417241899 is a deficient number, since it is larger than the sum of its proper divisors (13585987541).

18417241899 is a wasteful number, since it uses less digits than its factorization.

18417241899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15386199 (or 15386196 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 54.

The spelling of 18417241899 in words is "eighteen billion, four hundred seventeen million, two hundred forty-one thousand, eight hundred ninety-nine".