19878695676 has 168 divisors, whose sum is σ = 61065262944. Its totient is φ = 5540866560.

The previous prime is 19878695653. The next prime is 19878695687. The reversal of 19878695676 is 67659687891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 825016 + ... + 848768.

It is an arithmetic number, because the mean of its divisors is an integer number (363483708).

Almost surely, 2^19878695676 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19878695676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30532631472).

19878695676 is an abundant number, since it is smaller than the sum of its proper divisors (41186567268).

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

19878695676 is a wasteful number, since it uses less digits than its factorization.

19878695676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23823 (or 23806 counting only the distinct ones).

The product of its digits is 274337280, while the sum is 72.

The spelling of 19878695676 in words is "nineteen billion, eight hundred seventy-eight million, six hundred ninety-five thousand, six hundred seventy-six".