20426146747 has 2 divisors, whose sum is σ = 20426146748. Its totient is φ = 20426146746.

The previous prime is 20426146673. The next prime is 20426146753. The reversal of 20426146747 is 74764162402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20426146747 - 2⁷ = 20426146619 is a prime.

It is not a weakly prime, because it can be changed into another prime (20426146547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10213073373 + 10213073374.

It is an arithmetic number, because the mean of its divisors is an integer number (10213073374).

Almost surely, 2^20426146747 is an apocalyptic number.

20426146747 is a deficient number, since it is larger than the sum of its proper divisors (1).

20426146747 is an equidigital number, since it uses as much as digits as its factorization.

20426146747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 43.

The spelling of 20426146747 in words is "twenty billion, four hundred twenty-six million, one hundred forty-six thousand, seven hundred forty-seven".