20368091 has 4 divisors (see below), whose sum is σ = 21566232. Its totient is φ = 19169952.

The previous prime is 20368079. The next prime is 20368097. The reversal of 20368091 is 19086302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20368091 - 2¹⁸ = 20105947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20368097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599045 + ... + 599078.

It is an arithmetic number, because the mean of its divisors is an integer number (5391558).

Almost surely, 2^20368091 is an apocalyptic number.

20368091 is a deficient number, since it is larger than the sum of its proper divisors (1198141).

20368091 is a wasteful number, since it uses less digits than its factorization.

20368091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198140.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 20368091 is about 4513.1021481903. The cubic root of 20368091 is about 273.0969032568.

The spelling of 20368091 in words is "twenty million, three hundred sixty-eight thousand, ninety-one".