18502168220340 has 96 divisors (see below), whose sum is σ = 61116839583744. Its totient is φ = 4092645502080.

The previous prime is 18502168220311. The next prime is 18502168220357. The reversal of 18502168220340 is 4302286120581.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 18502168220292 and 18502168220301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 710515714 + ... + 710541753.

It is an arithmetic number, because the mean of its divisors is an integer number (636633745664).

Almost surely, 2^{18502168220340} is an apocalyptic number.

18502168220340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18502168220340 is an abundant number, since it is smaller than the sum of its proper divisors (42614671363404).

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

18502168220340 is a wasteful number, since it uses less digits than its factorization.

18502168220340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421057517 (or 1421057515 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 18502168220340 in words is "eighteen trillion, five hundred two billion, one hundred sixty-eight million, two hundred twenty thousand, three hundred forty".