19928047920 has 160 divisors (see below), whose sum is σ = 67635385344. Its totient is φ = 4813670400.

The previous prime is 19928047907. The next prime is 19928047927. The reversal of 19928047920 is 2974082991.

It is not an unprimeable number, because it can be changed into a prime (19928047927) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 728409 + ... + 755271.

Almost surely, 2^19928047920 is an apocalyptic number.

19928047920 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 19928047920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33817692672).

19928047920 is an abundant number, since it is smaller than the sum of its proper divisors (47707337424).

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

19928047920 is a wasteful number, since it uses less digits than its factorization.

19928047920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27171 (or 27165 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 51.

The spelling of 19928047920 in words is "nineteen billion, nine hundred twenty-eight million, forty-seven thousand, nine hundred twenty".