20113123 has 2 divisors, whose sum is σ = 20113124. Its totient is φ = 20113122.

The previous prime is 20113099. The next prime is 20113127. The reversal of 20113123 is 32131102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20113123 - 2⁹ = 20112611 is a prime.

It is not a weakly prime, because it can be changed into another prime (20113127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056561 + 10056562.

It is an arithmetic number, because the mean of its divisors is an integer number (10056562).

Almost surely, 2^20113123 is an apocalyptic number.

20113123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113123 is an equidigital number, since it uses as much as digits as its factorization.

20113123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 20113123 is about 4484.7656571999. The cubic root of 20113123 is about 271.9525715675.

Adding to 20113123 its reverse (32131102), we get a palindrome (52244225).

The spelling of 20113123 in words is "twenty million, one hundred thirteen thousand, one hundred twenty-three".