20310256746 has 108 divisors (see below), whose sum is σ = 48983700402. Its totient is φ = 6079162752.

The previous prime is 20310256741. The next prime is 20310256823. The reversal of 20310256746 is 64765201302.

20310256746 is a `hidden beast` number, since 20 + 31 + 0 + 2 + 567 + 46 = 666.

It can be written as a sum of positive squares in 9 ways, for example, as 2276721225 + 18033535521 = 47715^2 + 134289^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20310256746.

It is not an unprimeable number, because it can be changed into a prime (20310256741) 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 53 ways as a sum of consecutive naturals, for example, 4162060 + ... + 4166936.

Almost surely, 2^20310256746 is an apocalyptic number.

20310256746 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20310256746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24491850201).

20310256746 is an abundant number, since it is smaller than the sum of its proper divisors (28673443656).

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

20310256746 is a wasteful number, since it uses less digits than its factorization.

20310256746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4985 (or 4932 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 20310256746 in words is "twenty billion, three hundred ten million, two hundred fifty-six thousand, seven hundred forty-six".