19197278180940 has 48 divisors (see below), whose sum is σ = 53752737104640. Its totient is φ = 5119240067520.

The previous prime is 19197278180929. The next prime is 19197278180953. The reversal of 19197278180940 is 4908187279191.

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, 8761495 + ... + 10731185.

It is an arithmetic number, because the mean of its divisors is an integer number (1119848689680).

Almost surely, 2^{19197278180940} is an apocalyptic number.

19197278180940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19197278180940 is an abundant number, since it is smaller than the sum of its proper divisors (34555458923700).

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

19197278180940 is a wasteful number, since it uses less digits than its factorization.

19197278180940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132142 (or 2132140 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 66.

The spelling of 19197278180940 in words is "nineteen trillion, one hundred ninety-seven billion, two hundred seventy-eight million, one hundred eighty thousand, nine hundred forty".