19999703 has 4 divisors (see below), whose sum is σ = 20010120. Its totient is φ = 19989288.

The previous prime is 19999697. The next prime is 19999729. The reversal of 19999703 is 30799991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 30799991 = 163 ⋅188957.

It is a cyclic number.

It is not a de Polignac number, because 19999703 - 2¹⁰ = 19998679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19999303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1400 + ... + 6477.

It is an arithmetic number, because the mean of its divisors is an integer number (5002530).

Almost surely, 2^19999703 is an apocalyptic number.

19999703 is a deficient number, since it is larger than the sum of its proper divisors (10417).

19999703 is an equidigital number, since it uses as much as digits as its factorization.

19999703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10416.

The product of its (nonzero) digits is 137781, while the sum is 47.

The square root of 19999703 is about 4472.1027492668. The cubic root of 19999703 is about 271.4404180161.

It can be divided in two parts, 19999 and 703, that added together give a palindrome (20702).

The spelling of 19999703 in words is "nineteen million, nine hundred ninety-nine thousand, seven hundred three".