20113432231 has 2 divisors, whose sum is σ = 20113432232. Its totient is φ = 20113432230.

The previous prime is 20113432201. The next prime is 20113432259. The reversal of 20113432231 is 13223431102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20113432231 - 2⁷ = 20113432103 is a prime.

It is a super-2 number, since 2×20113432231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20113432201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056716115 + 10056716116.

It is an arithmetic number, because the mean of its divisors is an integer number (10056716116).

Almost surely, 2^20113432231 is an apocalyptic number.

20113432231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113432231 is an equidigital number, since it uses as much as digits as its factorization.

20113432231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20113432231 its reverse (13223431102), we get a palindrome (33336863333).

The spelling of 20113432231 in words is "twenty billion, one hundred thirteen million, four hundred thirty-two thousand, two hundred thirty-one".