19440223 has 6 divisors (see below), whose sum is σ = 21368312. Its totient is φ = 17672820.

The previous prime is 19440217. The next prime is 19440227. The reversal of 19440223 is 32204491.

It is not a de Polignac number, because 19440223 - 2¹³ = 19432031 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 (19440227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 80211 + ... + 80452.

Almost surely, 2^19440223 is an apocalyptic number.

19440223 is a deficient number, since it is larger than the sum of its proper divisors (1928089).

19440223 is a wasteful number, since it uses less digits than its factorization.

19440223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160685 (or 160674 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 19440223 is about 4409.1068256507. The cubic root of 19440223 is about 268.8853129307.

The spelling of 19440223 in words is "nineteen million, four hundred forty thousand, two hundred twenty-three".