19688942850 has 96 divisors (see below), whose sum is σ = 51740021760. Its totient is φ = 4941000000.

The previous prime is 19688942849. The next prime is 19688942851. The reversal of 19688942850 is 5824988691.

It is an interprime number because it is at equal distance from previous prime (19688942849) and next prime (19688942851).

It is a super-2 number, since 2×19688942850² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19688942851) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 407475 + ... + 453225.

It is an arithmetic number, because the mean of its divisors is an integer number (538958560).

Almost surely, 2^19688942850 is an apocalyptic number.

19688942850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19688942850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25870010880).

19688942850 is an abundant number, since it is smaller than the sum of its proper divisors (32051078910).

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

19688942850 is a wasteful number, since it uses less digits than its factorization.

19688942850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45936 (or 45931 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 60.

The spelling of 19688942850 in words is "nineteen billion, six hundred eighty-eight million, nine hundred forty-two thousand, eight hundred fifty".