20246519863 has 4 divisors (see below), whose sum is σ = 20380602928. Its totient is φ = 20112436800.

The previous prime is 20246519809. The next prime is 20246519933. The reversal of 20246519863 is 36891564202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36891564202 = 2 ⋅18445782101.

It is a cyclic number.

It is not a de Polignac number, because 20246519863 - 2¹⁷ = 20246388791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20246019863) 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 in 3 ways as a sum of consecutive naturals, for example, 67041306 + ... + 67041607.

It is an arithmetic number, because the mean of its divisors is an integer number (5095150732).

Almost surely, 2^20246519863 is an apocalyptic number.

20246519863 is a deficient number, since it is larger than the sum of its proper divisors (134083065).

20246519863 is a wasteful number, since it uses less digits than its factorization.

20246519863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134083064.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 20246519863 in words is "twenty billion, two hundred forty-six million, five hundred nineteen thousand, eight hundred sixty-three".