19739950 has 24 divisors (see below), whose sum is σ = 37082448. Its totient is φ = 7817280.

The previous prime is 19739939. The next prime is 19739959. The reversal of 19739950 is 5993791.

It is a junction number, because it is equal to n+sod(n) for n = 19739897 and 19739906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19739959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3234 + ... + 7066.

It is an arithmetic number, because the mean of its divisors is an integer number (1545102).

Almost surely, 2^19739950 is an apocalyptic number.

19739950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19739950 is a deficient number, since it is larger than the sum of its proper divisors (17342498).

19739950 is a wasteful number, since it uses less digits than its factorization.

19739950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3948 (or 3943 counting only the distinct ones).

The product of its (nonzero) digits is 76545, while the sum is 43.

The square root of 19739950 is about 4442.9663514368. The cubic root of 19739950 is about 270.2601516347.

The spelling of 19739950 in words is "nineteen million, seven hundred thirty-nine thousand, nine hundred fifty".