20339191 has 8 divisors (see below), whose sum is σ = 21702384. Its totient is φ = 18994560.

The previous prime is 20339173. The next prime is 20339197. The reversal of 20339191 is 19193302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20339191 - 2¹⁵ = 20306423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20339197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2340 + ... + 6793.

It is an arithmetic number, because the mean of its divisors is an integer number (2712798).

Almost surely, 2^20339191 is an apocalyptic number.

20339191 is a deficient number, since it is larger than the sum of its proper divisors (1363193).

20339191 is a wasteful number, since it uses less digits than its factorization.

20339191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9281.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 20339191 is about 4509.8992228208. The cubic root of 20339191 is about 272.9676776575.

The spelling of 20339191 in words is "twenty million, three hundred thirty-nine thousand, one hundred ninety-one".