20358161647 has 2 divisors, whose sum is σ = 20358161648. Its totient is φ = 20358161646.

The previous prime is 20358161599. The next prime is 20358161693. The reversal of 20358161647 is 74616185302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20358161647 - 2²³ = 20349773039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20358167647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10179080823 + 10179080824.

It is an arithmetic number, because the mean of its divisors is an integer number (10179080824).

Almost surely, 2^20358161647 is an apocalyptic number.

20358161647 is a deficient number, since it is larger than the sum of its proper divisors (1).

20358161647 is an equidigital number, since it uses as much as digits as its factorization.

20358161647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 20358161647 in words is "twenty billion, three hundred fifty-eight million, one hundred sixty-one thousand, six hundred forty-seven".