19423089 has 12 divisors (see below), whose sum is σ = 32063616. Its totient is φ = 11098872.

The previous prime is 19423087. The next prime is 19423121. The reversal of 19423089 is 98032491.

It is not a de Polignac number, because 19423089 - 2¹ = 19423087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19423087) 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 11 ways as a sum of consecutive naturals, for example, 154089 + ... + 154214.

It is an arithmetic number, because the mean of its divisors is an integer number (2671968).

Almost surely, 2^19423089 is an apocalyptic number.

It is an amenable number.

19423089 is a deficient number, since it is larger than the sum of its proper divisors (12640527).

19423089 is a wasteful number, since it uses less digits than its factorization.

19423089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308316 (or 308313 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 19423089 is about 4407.1633734183. The cubic root of 19423089 is about 268.8062940304.

The spelling of 19423089 in words is "nineteen million, four hundred twenty-three thousand, eighty-nine".