20112442531 has 2 divisors, whose sum is σ = 20112442532. Its totient is φ = 20112442530.

The previous prime is 20112442513. The next prime is 20112442543. The reversal of 20112442531 is 13524421102.

Together with previous prime (20112442513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20112442531 - 2²¹ = 20110345379 is a prime.

It is a super-2 number, since 2×20112442531² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20112442496 and 20112442505.

It is not a weakly prime, because it can be changed into another prime (20112442591) 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, 10056221265 + 10056221266.

It is an arithmetic number, because the mean of its divisors is an integer number (10056221266).

Almost surely, 2^20112442531 is an apocalyptic number.

20112442531 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112442531 is an equidigital number, since it uses as much as digits as its factorization.

20112442531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 20112442531 its reverse (13524421102), we get a palindrome (33636863633).

The spelling of 20112442531 in words is "twenty billion, one hundred twelve million, four hundred forty-two thousand, five hundred thirty-one".