19905703248 has 160 divisors (see below), whose sum is σ = 54806313600. Its totient is φ = 6207971328.

The previous prime is 19905703219. The next prime is 19905703273. The reversal of 19905703248 is 84230750991.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 19905703197 and 19905703206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39107218 + ... + 39107726.

It is an arithmetic number, because the mean of its divisors is an integer number (342539460).

Almost surely, 2^19905703248 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 19905703248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27403156800).

19905703248 is an abundant number, since it is smaller than the sum of its proper divisors (34900610352).

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

19905703248 is a wasteful number, since it uses less digits than its factorization.

19905703248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989 (or 983 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 19905703248 in words is "nineteen billion, nine hundred five million, seven hundred three thousand, two hundred forty-eight".