20113211431 has 2 divisors, whose sum is σ = 20113211432. Its totient is φ = 20113211430.

The previous prime is 20113211423. The next prime is 20113211441. The reversal of 20113211431 is 13411231102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20113211431 - 2³ = 20113211423 is a prime.

It is a super-2 number, since 2×20113211431² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20113211399 and 20113211408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20113211441) 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 as a sum of consecutive naturals, namely, 10056605715 + 10056605716.

It is an arithmetic number, because the mean of its divisors is an integer number (10056605716).

Almost surely, 2^20113211431 is an apocalyptic number.

20113211431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113211431 is an equidigital number, since it uses as much as digits as its factorization.

20113211431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 20113211431 its reverse (13411231102), we get a palindrome (33524442533).

The spelling of 20113211431 in words is "twenty billion, one hundred thirteen million, two hundred eleven thousand, four hundred thirty-one".