18002671940 has 24 divisors (see below), whose sum is σ = 41242485312. Its totient is φ = 6546426080.

The previous prime is 18002671913. The next prime is 18002671963. The reversal of 18002671940 is 4917620081.

It is a junction number, because it is equal to n+sod(n) for n = 18002671894 and 18002671903.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40914944 + ... + 40915383.

It is an arithmetic number, because the mean of its divisors is an integer number (1718436888).

Almost surely, 2^18002671940 is an apocalyptic number.

18002671940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18002671940 is an abundant number, since it is smaller than the sum of its proper divisors (23239813372).

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

18002671940 is a wasteful number, since it uses less digits than its factorization.

18002671940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81830347 (or 81830345 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 18002671940 in words is "eighteen billion, two million, six hundred seventy-one thousand, nine hundred forty".