20236127521231 has 4 divisors (see below), whose sum is σ = 20246510349000. Its totient is φ = 20225744693464.

The previous prime is 20236127521217. The next prime is 20236127521261. The reversal of 20236127521231 is 13212572163202.

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 20236127521231 - 2¹⁷ = 20236127390159 is a prime.

It is a super-2 number, since 2×20236127521231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20236127521261) 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, 5191410961 + ... + 5191414858.

It is an arithmetic number, because the mean of its divisors is an integer number (5061627587250).

Almost surely, 2^{20236127521231} is an apocalyptic number.

20236127521231 is a deficient number, since it is larger than the sum of its proper divisors (10382827769).

20236127521231 is a wasteful number, since it uses less digits than its factorization.

20236127521231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10382827768.

The product of its (nonzero) digits is 60480, while the sum is 37.

Adding to 20236127521231 its reverse (13212572163202), we get a palindrome (33448699684433).

The spelling of 20236127521231 in words is "twenty trillion, two hundred thirty-six billion, one hundred twenty-seven million, five hundred twenty-one thousand, two hundred thirty-one".