20413111123 has 2 divisors, whose sum is σ = 20413111124. Its totient is φ = 20413111122.

The previous prime is 20413111099. The next prime is 20413111139. The reversal of 20413111123 is 32111131402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20413111123 - 2⁵ = 20413111091 is a prime.

It is a super-2 number, since 2×20413111123² (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 20413111123.

It is not a weakly prime, because it can be changed into another prime (20413111163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206555561 + 10206555562.

It is an arithmetic number, because the mean of its divisors is an integer number (10206555562).

Almost surely, 2^20413111123 is an apocalyptic number.

20413111123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20413111123 is an equidigital number, since it uses as much as digits as its factorization.

20413111123 is an evil number, because the sum of its binary digits is even.

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

Adding to 20413111123 its reverse (32111131402), we get a palindrome (52524242525).

The spelling of 20413111123 in words is "twenty billion, four hundred thirteen million, one hundred eleven thousand, one hundred twenty-three".