19994723 has 8 divisors (see below), whose sum is σ = 22884192. Its totient is φ = 17113536.

The previous prime is 19994701. The next prime is 19994729. The reversal of 19994723 is 32749991.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19994723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19994729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4511 + ... + 7767.

It is an arithmetic number, because the mean of its divisors is an integer number (2860524).

Almost surely, 2^19994723 is an apocalyptic number.

19994723 is a deficient number, since it is larger than the sum of its proper divisors (2889469).

19994723 is an equidigital number, since it uses as much as digits as its factorization.

19994723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4141.

The product of its digits is 122472, while the sum is 44.

The square root of 19994723 is about 4471.5459295416. The cubic root of 19994723 is about 271.4178862566.

The spelling of 19994723 in words is "nineteen million, nine hundred ninety-four thousand, seven hundred twenty-three".