20623643111 has 2 divisors, whose sum is σ = 20623643112. Its totient is φ = 20623643110.

The previous prime is 20623643093. The next prime is 20623643129. The reversal of 20623643111 is 11134632602.

It is a balanced prime because it is at equal distance from previous prime (20623643093) and next prime (20623643129).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20623643111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20623640111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10311821555 + 10311821556.

It is an arithmetic number, because the mean of its divisors is an integer number (10311821556).

Almost surely, 2^20623643111 is an apocalyptic number.

20623643111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20623643111 is an equidigital number, since it uses as much as digits as its factorization.

20623643111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 20623643111 in words is "twenty billion, six hundred twenty-three million, six hundred forty-three thousand, one hundred eleven".