18441793840 has 40 divisors (see below), whose sum is σ = 42882858000. Its totient is φ = 7375739136.

The previous prime is 18441793831. The next prime is 18441793847. The reversal of 18441793840 is 4839714481.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (18441793847) 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, 1071382 + ... + 1088458.

It is an arithmetic number, because the mean of its divisors is an integer number (1072071450).

Almost surely, 2^18441793840 is an apocalyptic number.

18441793840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18441793840 is an abundant number, since it is smaller than the sum of its proper divisors (24441064160).

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

18441793840 is a wasteful number, since it uses less digits than its factorization.

18441793840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30589 (or 30583 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 18441793840 in words is "eighteen billion, four hundred forty-one million, seven hundred ninety-three thousand, eight hundred forty".