20770167643 has 2 divisors, whose sum is σ = 20770167644. Its totient is φ = 20770167642.

The previous prime is 20770167563. The next prime is 20770167697. The reversal of 20770167643 is 34676107702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20770167643 - 2¹³ = 20770159451 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20770167643.

It is not a weakly prime, because it can be changed into another prime (20770167443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10385083821 + 10385083822.

It is an arithmetic number, because the mean of its divisors is an integer number (10385083822).

Almost surely, 2^20770167643 is an apocalyptic number.

20770167643 is a deficient number, since it is larger than the sum of its proper divisors (1).

20770167643 is an equidigital number, since it uses as much as digits as its factorization.

20770167643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 296352, while the sum is 43.

The spelling of 20770167643 in words is "twenty billion, seven hundred seventy million, one hundred sixty-seven thousand, six hundred forty-three".