19368009 has 6 divisors (see below), whose sum is σ = 27976026. Its totient is φ = 12912000.

The previous prime is 19367977. The next prime is 19368023. The reversal of 19368009 is 90086391.

It can be written as a sum of positive squares in only one way, i.e., 19316025 + 51984 = 4395^2 + 228^2 .

It is not a de Polignac number, because 19368009 - 2⁵ = 19367977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19368029) 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, 1075992 + ... + 1076009.

It is an arithmetic number, because the mean of its divisors is an integer number (4662671).

Almost surely, 2^19368009 is an apocalyptic number.

It is an amenable number.

19368009 is a deficient number, since it is larger than the sum of its proper divisors (8608017).

19368009 is a wasteful number, since it uses less digits than its factorization.

19368009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152007 (or 2152004 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 19368009 is about 4400.9100195301. The cubic root of 19368009 is about 268.5519598161.

The spelling of 19368009 in words is "nineteen million, three hundred sixty-eight thousand, nine".