19234809 has 24 divisors (see below), whose sum is σ = 30637152. Its totient is φ = 11531520.

The previous prime is 19234807. The next prime is 19234811. The reversal of 19234809 is 90843291.

It is an interprime number because it is at equal distance from previous prime (19234807) and next prime (19234811).

It is not a de Polignac number, because 19234809 - 2¹ = 19234807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19234807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8602 + ... + 10604.

It is an arithmetic number, because the mean of its divisors is an integer number (1276548).

Almost surely, 2^19234809 is an apocalyptic number.

It is an amenable number.

19234809 is a deficient number, since it is larger than the sum of its proper divisors (11402343).

19234809 is a wasteful number, since it uses less digits than its factorization.

19234809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117 (or 2114 counting only the distinct ones).

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

The square root of 19234809 is about 4385.7506769081. The cubic root of 19234809 is about 267.9349038080.

The spelling of 19234809 in words is "nineteen million, two hundred thirty-four thousand, eight hundred nine".