20246598857 has 2 divisors, whose sum is σ = 20246598858. Its totient is φ = 20246598856.

The previous prime is 20246598839. The next prime is 20246598899. The reversal of 20246598857 is 75889564202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19240186681 + 1006412176 = 138709^2 + 31724^2 .

It is a cyclic number.

It is not a de Polignac number, because 20246598857 - 2¹⁸ = 20246336713 is a prime.

It is not a weakly prime, because it can be changed into another prime (20246598257) 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, 10123299428 + 10123299429.

It is an arithmetic number, because the mean of its divisors is an integer number (10123299429).

Almost surely, 2^20246598857 is an apocalyptic number.

It is an amenable number.

20246598857 is a deficient number, since it is larger than the sum of its proper divisors (1).

20246598857 is an equidigital number, since it uses as much as digits as its factorization.

20246598857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9676800, while the sum is 56.

The spelling of 20246598857 in words is "twenty billion, two hundred forty-six million, five hundred ninety-eight thousand, eight hundred fifty-seven".