20437546879 has 2 divisors, whose sum is σ = 20437546880. Its totient is φ = 20437546878.

The previous prime is 20437546867. The next prime is 20437546937. The reversal of 20437546879 is 97864573402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20437546879 - 2⁷ = 20437546751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20437546819) 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, 10218773439 + 10218773440.

It is an arithmetic number, because the mean of its divisors is an integer number (10218773440).

Almost surely, 2^20437546879 is an apocalyptic number.

20437546879 is a deficient number, since it is larger than the sum of its proper divisors (1).

20437546879 is an equidigital number, since it uses as much as digits as its factorization.

20437546879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10160640, while the sum is 55.

The spelling of 20437546879 in words is "twenty billion, four hundred thirty-seven million, five hundred forty-six thousand, eight hundred seventy-nine".