2106643423 has 2 divisors, whose sum is σ = 2106643424. Its totient is φ = 2106643422.

The previous prime is 2106643391. The next prime is 2106643453. The reversal of 2106643423 is 3243466012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2106643423 - 2⁵ = 2106643391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2106643453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1053321711 + 1053321712.

It is an arithmetic number, because the mean of its divisors is an integer number (1053321712).

Almost surely, 2^2106643423 is an apocalyptic number.

2106643423 is a deficient number, since it is larger than the sum of its proper divisors (1).

2106643423 is an equidigital number, since it uses as much as digits as its factorization.

2106643423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 2106643423 is about 45898.1853998609. The cubic root of 2106643423 is about 1281.9281290556.

The spelling of 2106643423 in words is "two billion, one hundred six million, six hundred forty-three thousand, four hundred twenty-three".