20928631420111 has 2 divisors, whose sum is σ = 20928631420112. Its totient is φ = 20928631420110.

The previous prime is 20928631420009. The next prime is 20928631420117. The reversal of 20928631420111 is 11102413682902.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20928631420111 is a prime.

It is a super-2 number, since 2×20928631420111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20928631420117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10464315710055 + 10464315710056.

It is an arithmetic number, because the mean of its divisors is an integer number (10464315710056).

Almost surely, 2^{20928631420111} is an apocalyptic number.

20928631420111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20928631420111 is an equidigital number, since it uses as much as digits as its factorization.

20928631420111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 20928631420111 in words is "twenty trillion, nine hundred twenty-eight billion, six hundred thirty-one million, four hundred twenty thousand, one hundred eleven".