20445080111 has 2 divisors, whose sum is σ = 20445080112. Its totient is φ = 20445080110.

The previous prime is 20445080101. The next prime is 20445080153. The reversal of 20445080111 is 11108054402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20445080111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20445080101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10222540055 + 10222540056.

It is an arithmetic number, because the mean of its divisors is an integer number (10222540056).

Almost surely, 2^20445080111 is an apocalyptic number.

20445080111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20445080111 is an equidigital number, since it uses as much as digits as its factorization.

20445080111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 26.

The spelling of 20445080111 in words is "twenty billion, four hundred forty-five million, eighty thousand, one hundred eleven".