19928039040 has 2048 divisors, whose sum is σ = 98703360000. Its totient is φ = 3678732288.

The previous prime is 19928039009. The next prime is 19928039041. The reversal of 19928039040 is 4093082991.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (19928039041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 687173746 + ... + 687173774.

It is an arithmetic number, because the mean of its divisors is an integer number (48195000).

Almost surely, 2^19928039040 is an apocalyptic number.

19928039040 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 19928039040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49351680000).

19928039040 is an abundant number, since it is smaller than the sum of its proper divisors (78775320960).

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

19928039040 is a wasteful number, since it uses less digits than its factorization.

19928039040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The spelling of 19928039040 in words is "nineteen billion, nine hundred twenty-eight million, thirty-nine thousand, forty".