19738851608 has 32 divisors (see below), whose sum is σ = 42708207360. Its totient is φ = 8377374240.

The previous prime is 19738851581. The next prime is 19738851617. The reversal of 19738851608 is 80615883791.

It is a Harshad number since it is a multiple of its sum of digits (56).

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, 1705298 + ... + 1716833.

It is an arithmetic number, because the mean of its divisors is an integer number (1334631480).

Almost surely, 2^19738851608 is an apocalyptic number.

It is an amenable number.

19738851608 is an abundant number, since it is smaller than the sum of its proper divisors (22969355752).

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

19738851608 is a wasteful number, since it uses less digits than its factorization.

19738851608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422247 (or 3422243 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 56.

The spelling of 19738851608 in words is "nineteen billion, seven hundred thirty-eight million, eight hundred fifty-one thousand, six hundred eight".