18834899940 has 72 divisors (see below), whose sum is σ = 57150719808. Its totient is φ = 5021040960.

The previous prime is 18834899929. The next prime is 18834899957. The reversal of 18834899940 is 4999843881.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 617079 + ... + 646881.

Almost surely, 2^18834899940 is an apocalyptic number.

18834899940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18834899940 is an abundant number, since it is smaller than the sum of its proper divisors (38315819868).

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

18834899940 is a wasteful number, since it uses less digits than its factorization.

18834899940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33329 (or 33324 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 63.

The spelling of 18834899940 in words is "eighteen billion, eight hundred thirty-four million, eight hundred ninety-nine thousand, nine hundred forty".