18409671000 has 384 divisors, whose sum is σ = 71804828160. Its totient is φ = 4167072000.

The previous prime is 18409670941. The next prime is 18409671013. The reversal of 18409671000 is 17690481.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6739635 + ... + 6742365.

It is an arithmetic number, because the mean of its divisors is an integer number (186991740).

Almost surely, 2^18409671000 is an apocalyptic number.

18409671000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18409671000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35902414080).

18409671000 is an abundant number, since it is smaller than the sum of its proper divisors (53395157160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18409671000 is a wasteful number, since it uses less digits than its factorization.

18409671000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872 (or 2855 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 18409671000 in words is "eighteen billion, four hundred nine million, six hundred seventy-one thousand".