18241899839 has 8 divisors (see below), whose sum is σ = 18344771328. Its totient is φ = 18139105440.

The previous prime is 18241899773. The next prime is 18241899853. The reversal of 18241899839 is 93899814281.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18241899839 is a prime.

It is a super-2 number, since 2×18241899839² (a number of 21 digits) 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 (18241899859) 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, 493469 + ... + 529145.

It is an arithmetic number, because the mean of its divisors is an integer number (2293096416).

Almost surely, 2^18241899839 is an apocalyptic number.

18241899839 is a deficient number, since it is larger than the sum of its proper divisors (102871489).

18241899839 is a wasteful number, since it uses less digits than its factorization.

18241899839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38545.

The product of its digits is 8957952, while the sum is 62.

The spelling of 18241899839 in words is "eighteen billion, two hundred forty-one million, eight hundred ninety-nine thousand, eight hundred thirty-nine".