19950890 has 16 divisors (see below), whose sum is σ = 37473408. Its totient is φ = 7633296.

The previous prime is 19950883. The next prime is 19950901. The reversal of 19950890 is 9805991.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43142 + ... + 43601.

It is an arithmetic number, because the mean of its divisors is an integer number (2342088).

Almost surely, 2^19950890 is an apocalyptic number.

19950890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19950890 is a deficient number, since it is larger than the sum of its proper divisors (17522518).

19950890 is a wasteful number, since it uses less digits than its factorization.

19950890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86773.

The product of its (nonzero) digits is 29160, while the sum is 41.

The square root of 19950890 is about 4466.6419153543. The cubic root of 19950890 is about 271.2194044788.

The spelling of 19950890 in words is "nineteen million, nine hundred fifty thousand, eight hundred ninety".