19807975950 has 192 divisors, whose sum is σ = 59644992000. Its totient is φ = 4249428480.

The previous prime is 19807975939. The next prime is 19807975961. The reversal of 19807975950 is 5957970891.

It is an interprime number because it is at equal distance from previous prime (19807975939) and next prime (19807975961).

It is a super-2 number, since 2×19807975950² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 2169996 + ... + 2179104.

It is an arithmetic number, because the mean of its divisors is an integer number (310651000).

Almost surely, 2^19807975950 is an apocalyptic number.

19807975950 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 19807975950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29822496000).

19807975950 is an abundant number, since it is smaller than the sum of its proper divisors (39837016050).

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

19807975950 is a wasteful number, since it uses less digits than its factorization.

19807975950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9259 (or 9254 counting only the distinct ones).

The product of its (nonzero) digits is 7144200, while the sum is 60.

The spelling of 19807975950 in words is "nineteen billion, eight hundred seven million, nine hundred seventy-five thousand, nine hundred fifty".