20306243064 has 32 divisors (see below), whose sum is σ = 51288970320. Its totient is φ = 6698966016.

The previous prime is 20306243063. The next prime is 20306243077. The reversal of 20306243064 is 46034260302.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20306243063) 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 in 7 ways as a sum of consecutive naturals, for example, 4358979 + ... + 4363634.

Almost surely, 2^20306243064 is an apocalyptic number.

20306243064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20306243064 is an abundant number, since it is smaller than the sum of its proper divisors (30982727256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20306243064 is a wasteful number, since it uses less digits than its factorization.

20306243064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8722719 (or 8722715 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

The spelling of 20306243064 in words is "twenty billion, three hundred six million, two hundred forty-three thousand, sixty-four".