19197674809920 has 112 divisors (see below), whose sum is σ = 67725130609920. Its totient is φ = 5119379947008.

The previous prime is 19197674809919. The next prime is 19197674809927. The reversal of 19197674809920 is 2990847679191.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (19197674809927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1110967912 + ... + 1110985191.

It is an arithmetic number, because the mean of its divisors is an integer number (604688666160).

Almost surely, 2^{19197674809920} is an apocalyptic number.

19197674809920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19197674809920 is an abundant number, since it is smaller than the sum of its proper divisors (48527455800000).

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

19197674809920 is a wasteful number, since it uses less digits than its factorization.

19197674809920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221953129 (or 2221953113 counting only the distinct ones).

The product of its (nonzero) digits is 123451776, while the sum is 72.

The spelling of 19197674809920 in words is "nineteen trillion, one hundred ninety-seven billion, six hundred seventy-four million, eight hundred nine thousand, nine hundred twenty".