19940223 has 16 divisors (see below), whose sum is σ = 27648000. Its totient is φ = 12769440.

The previous prime is 19940191. The next prime is 19940237. The reversal of 19940223 is 32204991.

It is not a de Polignac number, because 19940223 - 2⁵ = 19940191 is a prime.

It is a super-2 number, since 2×19940223² = 795224986579458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19940273) 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 15 ways as a sum of consecutive naturals, for example, 13138 + ... + 14576.

It is an arithmetic number, because the mean of its divisors is an integer number (1728000).

Almost surely, 2^19940223 is an apocalyptic number.

19940223 is a deficient number, since it is larger than the sum of its proper divisors (7707777).

19940223 is a wasteful number, since it uses less digits than its factorization.

19940223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 19940223 is about 4465.4476819240. The cubic root of 19940223 is about 271.1710588803.

The spelling of 19940223 in words is "nineteen million, nine hundred forty thousand, two hundred twenty-three".