19499713 has 4 divisors (see below), whose sum is σ = 20128768. Its totient is φ = 18870660.

The previous prime is 19499671. The next prime is 19499729. The reversal of 19499713 is 31799491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31799491 = 4813 ⋅6607.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19499713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19499713.

It is not an unprimeable number, because it can be changed into a prime (19499113) 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, 314481 + ... + 314542.

It is an arithmetic number, because the mean of its divisors is an integer number (5032192).

Almost surely, 2^19499713 is an apocalyptic number.

It is an amenable number.

19499713 is a deficient number, since it is larger than the sum of its proper divisors (629055).

19499713 is an equidigital number, since it uses as much as digits as its factorization.

19499713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629054.

The product of its digits is 61236, while the sum is 43.

The square root of 19499713 is about 4415.8479366935. The cubic root of 19499713 is about 269.1593101004.

The spelling of 19499713 in words is "nineteen million, four hundred ninety-nine thousand, seven hundred thirteen".