19040823 has 12 divisors (see below), whose sum is σ = 27777048. Its totient is φ = 12567600.

The previous prime is 19040807. The next prime is 19040843. The reversal of 19040823 is 32804091.

It is not a de Polignac number, because 19040823 - 2⁴ = 19040807 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19040843) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 9565 + ... + 11382.

It is an arithmetic number, because the mean of its divisors is an integer number (2314754).

Almost surely, 2^19040823 is an apocalyptic number.

19040823 is a deficient number, since it is larger than the sum of its proper divisors (8736225).

19040823 is a wasteful number, since it uses less digits than its factorization.

19040823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21054 (or 21051 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 19040823 is about 4363.5791501931. The cubic root of 19040823 is about 267.0311372179.

The spelling of 19040823 in words is "nineteen million, forty thousand, eight hundred twenty-three".