199822961950 has 12 divisors (see below), whose sum is σ = 371670709320. Its totient is φ = 79929184760.

The previous prime is 199822961881. The next prime is 199822961953. The reversal of 199822961950 is 59169228991.

It is a super-2 number, since 2×199822961950² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199822961953) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1998229570 + ... + 1998229669.

It is an arithmetic number, because the mean of its divisors is an integer number (30972559110).

Almost surely, 2^199822961950 is an apocalyptic number.

199822961950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199822961950 is a deficient number, since it is larger than the sum of its proper divisors (171847747370).

199822961950 is a wasteful number, since it uses less digits than its factorization.

199822961950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3996459251 (or 3996459246 counting only the distinct ones).

The product of its (nonzero) digits is 6298560, while the sum is 61.

The spelling of 199822961950 in words is "one hundred ninety-nine billion, eight hundred twenty-two million, nine hundred sixty-one thousand, nine hundred fifty".