19985263817370 has 32 divisors (see below), whose sum is σ = 47968677228672. Its totient is φ = 5328954343872.

The previous prime is 19985263817359. The next prime is 19985263817459. The reversal of 19985263817370 is 7371836258991.

It is a junction number, because it is equal to n+sod(n) for n = 19985263817295 and 19985263817304.

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, 27721977 + ... + 28433756.

It is an arithmetic number, because the mean of its divisors is an integer number (1499021163396).

Almost surely, 2^{19985263817370} is an apocalyptic number.

19985263817370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19985263817370 is an abundant number, since it is smaller than the sum of its proper divisors (27983413411302).

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

19985263817370 is a wasteful number, since it uses less digits than its factorization.

19985263817370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56167606.

The product of its (nonzero) digits is 137168640, while the sum is 69.

The spelling of 19985263817370 in words is "nineteen trillion, nine hundred eighty-five billion, two hundred sixty-three million, eight hundred seventeen thousand, three hundred seventy".