20771111407 has 2 divisors, whose sum is σ = 20771111408. Its totient is φ = 20771111406.

The previous prime is 20771111363. The next prime is 20771111453. The reversal of 20771111407 is 70411117702.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20771111407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20771111107) 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, 10385555703 + 10385555704.

It is an arithmetic number, because the mean of its divisors is an integer number (10385555704).

Almost surely, 2^20771111407 is an apocalyptic number.

20771111407 is a deficient number, since it is larger than the sum of its proper divisors (1).

20771111407 is an equidigital number, since it uses as much as digits as its factorization.

20771111407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2744, while the sum is 31.

The spelling of 20771111407 in words is "twenty billion, seven hundred seventy-one million, one hundred eleven thousand, four hundred seven".