19949623 has 8 divisors (see below), whose sum is σ = 20827040. Its totient is φ = 19090080.

The previous prime is 19949603. The next prime is 19949627. The reversal of 19949623 is 32694991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19949623 - 2⁵ = 19949591 is a prime.

It is the 4467-th Hogben number.

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 19949623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19949627) by changing a digit.

It is a nontrivial repunit in base 4466.

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, 2163 + ... + 6676.

It is an arithmetic number, because the mean of its divisors is an integer number (2603380).

Almost surely, 2^19949623 is an apocalyptic number.

19949623 is a deficient number, since it is larger than the sum of its proper divisors (877417).

19949623 is an equidigital number, since it uses as much as digits as its factorization.

19949623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8937.

The product of its digits is 104976, while the sum is 43.

The square root of 19949623 is about 4466.5000839584. The cubic root of 19949623 is about 271.2136630096.

The spelling of 19949623 in words is "nineteen million, nine hundred forty-nine thousand, six hundred twenty-three".