1999999950 has 48 divisors (see below), whose sum is σ = 5341543536. Its totient is φ = 492307200.

The previous prime is 1999999943. The next prime is 1999999973. The reversal of 1999999950 is 599999991.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 510871 + ... + 514770.

It is an arithmetic number, because the mean of its divisors is an integer number (111282157).

Almost surely, 2^1999999950 is an apocalyptic number.

1999999950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1999999950 is an abundant number, since it is smaller than the sum of its proper divisors (3341543586).

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

1999999950 is a wasteful number, since it uses less digits than its factorization.

1999999950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025669 (or 1025664 counting only the distinct ones).

The product of its (nonzero) digits is 23914845, while the sum is 69.

The square root of 1999999950 is about 44721.3589909788. The cubic root of 1999999950 is about 1259.9210393955.

The spelling of 1999999950 in words is "one billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred fifty".