20236004257 has 8 divisors (see below), whose sum is σ = 23518843200. Its totient is φ = 17051160624.

The previous prime is 20236004249. The next prime is 20236004303. The reversal of 20236004257 is 75240063202.

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 20236004257 - 2³ = 20236004249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20236004227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24498382 + ... + 24499207.

It is an arithmetic number, because the mean of its divisors is an integer number (2939855400).

Almost surely, 2^20236004257 is an apocalyptic number.

It is an amenable number.

20236004257 is a deficient number, since it is larger than the sum of its proper divisors (3282838943).

20236004257 is an equidigital number, since it uses as much as digits as its factorization.

20236004257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48997655.

The product of its (nonzero) digits is 20160, while the sum is 31.

Adding to 20236004257 its reverse (75240063202), we get a palindrome (95476067459).

The spelling of 20236004257 in words is "twenty billion, two hundred thirty-six million, four thousand, two hundred fifty-seven".