19928674944 has 384 divisors, whose sum is σ = 62954236800. Its totient is φ = 6262603776.

The previous prime is 19928674939. The next prime is 19928674979. The reversal of 19928674944 is 44947682991.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×19928674944² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 63669732 + ... + 63670044.

It is an arithmetic number, because the mean of its divisors is an integer number (163943325).

Almost surely, 2^19928674944 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 19928674944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31477118400).

19928674944 is an abundant number, since it is smaller than the sum of its proper divisors (43025561856).

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

19928674944 is an equidigital number, since it uses as much as digits as its factorization.

19928674944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454 (or 430 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 63.

The spelling of 19928674944 in words is "nineteen billion, nine hundred twenty-eight million, six hundred seventy-four thousand, nine hundred forty-four".