19978216700046 has 24 divisors (see below), whose sum is σ = 43919054895912. Its totient is φ = 6054005060400.

The previous prime is 19978216699967. The next prime is 19978216700081. The reversal of 19978216700046 is 64000761287991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13759101685 + ... + 13759103136.

It is an arithmetic number, because the mean of its divisors is an integer number (1829960620663).

Almost surely, 2^{19978216700046} is an apocalyptic number.

19978216700046 is an abundant number, since it is smaller than the sum of its proper divisors (23940838195866).

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

19978216700046 is a wasteful number, since it uses less digits than its factorization.

19978216700046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27518204848 (or 27518204837 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 60.

The spelling of 19978216700046 in words is "nineteen trillion, nine hundred seventy-eight billion, two hundred sixteen million, seven hundred thousand, forty-six".