19739238880 has 96 divisors (see below), whose sum is σ = 47474023968. Its totient is φ = 7753881600.

The previous prime is 19739238859. The next prime is 19739238913. The reversal of 19739238880 is 8883293791.

It is a congruent number.

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, 8324095 + ... + 8326465.

It is an arithmetic number, because the mean of its divisors is an integer number (494521083).

Almost surely, 2^19739238880 is an apocalyptic number.

19739238880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19739238880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23737011984).

19739238880 is an abundant number, since it is smaller than the sum of its proper divisors (27734785088).

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

19739238880 is a wasteful number, since it uses less digits than its factorization.

19739238880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300 (or 3292 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 58.

The spelling of 19739238880 in words is "nineteen billion, seven hundred thirty-nine million, two hundred thirty-eight thousand, eight hundred eighty".