20470639551067 has 2 divisors, whose sum is σ = 20470639551068. Its totient is φ = 20470639551066.

The previous prime is 20470639550969. The next prime is 20470639551071. The reversal of 20470639551067 is 76015593607402.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20470639551067 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20470639550999 and 20470639551017.

It is not a weakly prime, because it can be changed into another prime (20470639551667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10235319775533 + 10235319775534.

It is an arithmetic number, because the mean of its divisors is an integer number (10235319775534).

Almost surely, 2^{20470639551067} is an apocalyptic number.

20470639551067 is a deficient number, since it is larger than the sum of its proper divisors (1).

20470639551067 is an equidigital number, since it uses as much as digits as its factorization.

20470639551067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9525600, while the sum is 55.

The spelling of 20470639551067 in words is "twenty trillion, four hundred seventy billion, six hundred thirty-nine million, five hundred fifty-one thousand, sixty-seven".