18471279873 has 8 divisors (see below), whose sum is σ = 24633459136. Its totient is φ = 12311643600.

The previous prime is 18471279857. The next prime is 18471279877. The reversal of 18471279873 is 37897217481.

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

It is not a de Polignac number, because 18471279873 - 2⁴ = 18471279857 is a prime.

It is a super-2 number, since 2×18471279873² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18471279877) 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, 618733 + ... + 647898.

It is an arithmetic number, because the mean of its divisors is an integer number (3079182392).

Almost surely, 2^18471279873 is an apocalyptic number.

It is an amenable number.

18471279873 is a deficient number, since it is larger than the sum of its proper divisors (6162179263).

18471279873 is a wasteful number, since it uses less digits than its factorization.

18471279873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271495.

The product of its digits is 4741632, while the sum is 57.

The spelling of 18471279873 in words is "eighteen billion, four hundred seventy-one million, two hundred seventy-nine thousand, eight hundred seventy-three".