19109731815140 has 24 divisors (see below), whose sum is σ = 40984275894912. Its totient is φ = 7481256710240.

The previous prime is 19109731815133. The next prime is 19109731815227. The reversal of 19109731815140 is 4151813790191.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10164750026 + ... + 10164751905.

It is an arithmetic number, because the mean of its divisors is an integer number (1707678162288).

Almost surely, 2^{19109731815140} is an apocalyptic number.

19109731815140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19109731815140 is an abundant number, since it is smaller than the sum of its proper divisors (21874544079772).

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

19109731815140 is a wasteful number, since it uses less digits than its factorization.

19109731815140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20329501987 (or 20329501985 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 50.

The spelling of 19109731815140 in words is "nineteen trillion, one hundred nine billion, seven hundred thirty-one million, eight hundred fifteen thousand, one hundred forty".