19950189950 has 24 divisors (see below), whose sum is σ = 37577074080. Its totient is φ = 7879060800.

The previous prime is 19950189947. The next prime is 19950189971. The reversal of 19950189950 is 5998105991.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2521391 + ... + 2529290.

It is an arithmetic number, because the mean of its divisors is an integer number (1565711420).

Almost surely, 2^19950189950 is an apocalyptic number.

19950189950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19950189950 is a deficient number, since it is larger than the sum of its proper divisors (17626884130).

19950189950 is a wasteful number, since it uses less digits than its factorization.

19950189950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050772 (or 5050767 counting only the distinct ones).

The product of its (nonzero) digits is 1312200, while the sum is 56.

The spelling of 19950189950 in words is "nineteen billion, nine hundred fifty million, one hundred eighty-nine thousand, nine hundred fifty".