19924970940 has 216 divisors, whose sum is σ = 71005963392. Its totient is φ = 4508985600.

The previous prime is 19924970917. The next prime is 19924970957. The reversal of 19924970940 is 4907942991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 879637 + ... + 902003.

It is an arithmetic number, because the mean of its divisors is an integer number (328731312).

Almost surely, 2^19924970940 is an apocalyptic number.

19924970940 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 19924970940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35502981696).

19924970940 is an abundant number, since it is smaller than the sum of its proper divisors (51080992452).

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

19924970940 is a wasteful number, since it uses less digits than its factorization.

19924970940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22497 (or 22485 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The spelling of 19924970940 in words is "nineteen billion, nine hundred twenty-four million, nine hundred seventy thousand, nine hundred forty".