20413191 has 4 divisors (see below), whose sum is σ = 27217592. Its totient is φ = 13608792.

The previous prime is 20413177. The next prime is 20413199. The reversal of 20413191 is 19131402.

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

It is not a de Polignac number, because 20413191 - 2¹³ = 20404999 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 (20413199) 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, 3402196 + ... + 3402201.

It is an arithmetic number, because the mean of its divisors is an integer number (6804398).

Almost surely, 2^20413191 is an apocalyptic number.

20413191 is a deficient number, since it is larger than the sum of its proper divisors (6804401).

20413191 is an equidigital number, since it uses as much as digits as its factorization.

20413191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6804400.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 20413191 is about 4518.0959485164. The cubic root of 20413191 is about 273.2983227350.

Adding to 20413191 its reverse (19131402), we get a palindrome (39544593).

The spelling of 20413191 in words is "twenty million, four hundred thirteen thousand, one hundred ninety-one".