20541332231 has 16 divisors (see below), whose sum is σ = 24747667200. Its totient is φ = 16655683968.

The previous prime is 20541332219. The next prime is 20541332233. The reversal of 20541332231 is 13223314502.

It is a happy number.

It is not a de Polignac number, because 20541332231 - 2¹⁸ = 20541070087 is a prime.

It is a super-2 number, since 2×20541332231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20541332231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20541332233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22226 + ... + 203903.

It is an arithmetic number, because the mean of its divisors is an integer number (1546729200).

Almost surely, 2^20541332231 is an apocalyptic number.

20541332231 is a deficient number, since it is larger than the sum of its proper divisors (4206334969).

20541332231 is a wasteful number, since it uses less digits than its factorization.

20541332231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226838.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 20541332231 its reverse (13223314502), we get a palindrome (33764646733).

The spelling of 20541332231 in words is "twenty billion, five hundred forty-one million, three hundred thirty-two thousand, two hundred thirty-one".