20423130911 has 2 divisors, whose sum is σ = 20423130912. Its totient is φ = 20423130910.

The previous prime is 20423130869. The next prime is 20423130943. The reversal of 20423130911 is 11903132402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20423130911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20423130961) 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, 10211565455 + 10211565456.

It is an arithmetic number, because the mean of its divisors is an integer number (10211565456).

Almost surely, 2^20423130911 is an apocalyptic number.

20423130911 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423130911 is an equidigital number, since it uses as much as digits as its factorization.

20423130911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 20423130911 in words is "twenty billion, four hundred twenty-three million, one hundred thirty thousand, nine hundred eleven".