18593001945840 has 80 divisors (see below), whose sum is σ = 65872349756928. Its totient is φ = 4249829015808.

The previous prime is 18593001945823. The next prime is 18593001945883. The reversal of 18593001945840 is 4854910039581.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5533629852 + ... + 5533633211.

Almost surely, 2^{18593001945840} is an apocalyptic number.

18593001945840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18593001945840 is an abundant number, since it is smaller than the sum of its proper divisors (47279347811088).

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

18593001945840 is a wasteful number, since it uses less digits than its factorization.

18593001945840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11067263086 (or 11067263080 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 57.

The spelling of 18593001945840 in words is "eighteen trillion, five hundred ninety-three billion, one million, nine hundred forty-five thousand, eight hundred forty".