20232591 has 8 divisors (see below), whose sum is σ = 27486000. Its totient is φ = 13233792.

The previous prime is 20232581. The next prime is 20232613. The reversal of 20232591 is 19523202.

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

It is not a de Polignac number, because 20232591 - 2⁵ = 20232559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20232521) 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, 63466 + ... + 63783.

It is an arithmetic number, because the mean of its divisors is an integer number (3435750).

Almost surely, 2^20232591 is an apocalyptic number.

20232591 is a deficient number, since it is larger than the sum of its proper divisors (7253409).

20232591 is a wasteful number, since it uses less digits than its factorization.

20232591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127305.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 20232591 is about 4498.0652507495. The cubic root of 20232591 is about 272.4899572653.

Adding to 20232591 its reverse (19523202), we get a palindrome (39755793).

The spelling of 20232591 in words is "twenty million, two hundred thirty-two thousand, five hundred ninety-one".