19892120805708 has 48 divisors (see below), whose sum is σ = 47561428168800. Its totient is φ = 6467022144000.

The previous prime is 19892120805653. The next prime is 19892120805731. The reversal of 19892120805708 is 80750802129891.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4499983 + ... + 7748166.

It is an arithmetic number, because the mean of its divisors is an integer number (990863086850).

Almost surely, 2^{19892120805708} is an apocalyptic number.

It is an amenable number.

19892120805708 is an abundant number, since it is smaller than the sum of its proper divisors (27669307363092).

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

19892120805708 is a wasteful number, since it uses less digits than its factorization.

19892120805708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12251498 (or 12251496 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 60.

The spelling of 19892120805708 in words is "nineteen trillion, eight hundred ninety-two billion, one hundred twenty million, eight hundred five thousand, seven hundred eight".