19859720078848 has 80 divisors (see below), whose sum is σ = 42735250237680. Its totient is φ = 9165544022016.

The previous prime is 19859720078833. The next prime is 19859720078899. The reversal of 19859720078848 is 84887002795891.

It is a super-2 number, since 2×19859720078848² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 147889111 + ... + 148023337.

It is an arithmetic number, because the mean of its divisors is an integer number (534190627971).

Almost surely, 2^{19859720078848} is an apocalyptic number.

It is an amenable number.

19859720078848 is an abundant number, since it is smaller than the sum of its proper divisors (22875530158832).

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

19859720078848 is a wasteful number, since it uses less digits than its factorization.

19859720078848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156487 (or 156471 counting only the distinct ones).

The product of its (nonzero) digits is 650280960, while the sum is 76.

The spelling of 19859720078848 in words is "nineteen trillion, eight hundred fifty-nine billion, seven hundred twenty million, seventy-eight thousand, eight hundred forty-eight".