20447240167 has 2 divisors, whose sum is σ = 20447240168. Its totient is φ = 20447240166.

The previous prime is 20447240123. The next prime is 20447240173. The reversal of 20447240167 is 76104274402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20447240167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20447240267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10223620083 + 10223620084.

It is an arithmetic number, because the mean of its divisors is an integer number (10223620084).

Almost surely, 2^20447240167 is an apocalyptic number.

20447240167 is a deficient number, since it is larger than the sum of its proper divisors (1).

20447240167 is an equidigital number, since it uses as much as digits as its factorization.

20447240167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75264, while the sum is 37.

The spelling of 20447240167 in words is "twenty billion, four hundred forty-seven million, two hundred forty thousand, one hundred sixty-seven".