18735890018840 has 16 divisors (see below), whose sum is σ = 42155752542480. Its totient is φ = 7494356007520.

The previous prime is 18735890018779. The next prime is 18735890018851. The reversal of 18735890018840 is 4881009853781.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234198625196 + ... + 234198625275.

It is an arithmetic number, because the mean of its divisors is an integer number (2634734533905).

Almost surely, 2^{18735890018840} is an apocalyptic number.

18735890018840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18735890018840 is an abundant number, since it is smaller than the sum of its proper divisors (23419862523640).

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

18735890018840 is a wasteful number, since it uses less digits than its factorization.

18735890018840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468397250482 (or 468397250478 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 62.

The spelling of 18735890018840 in words is "eighteen trillion, seven hundred thirty-five billion, eight hundred ninety million, eighteen thousand, eight hundred forty".