19959950 has 24 divisors (see below), whose sum is σ = 37243152. Its totient is φ = 7958720.

The previous prime is 19959949. The next prime is 19959977. The reversal of 19959950 is 5995991.

It is a junction number, because it is equal to n+sod(n) for n = 19959895 and 19959904.

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, 30527 + ... + 31173.

It is an arithmetic number, because the mean of its divisors is an integer number (1551798).

Almost surely, 2^19959950 is an apocalyptic number.

19959950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19959950 is a deficient number, since it is larger than the sum of its proper divisors (17283202).

19959950 is a wasteful number, since it uses less digits than its factorization.

19959950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276 (or 1271 counting only the distinct ones).

The product of its (nonzero) digits is 164025, while the sum is 47.

The square root of 19959950 is about 4467.6559849657. The cubic root of 19959950 is about 271.2604532063.

The spelling of 19959950 in words is "nineteen million, nine hundred fifty-nine thousand, nine hundred fifty".