20486210256 has 120 divisors (see below), whose sum is σ = 59857106400. Its totient is φ = 6782714496.

The previous prime is 20486210207. The next prime is 20486210287. The reversal of 20486210256 is 65201268402.

It is a happy number.

20486210256 is a `hidden beast` number, since 2 + 0 + 4 + 8 + 621 + 0 + 25 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20486210256.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 561631 + ... + 596993.

It is an arithmetic number, because the mean of its divisors is an integer number (498809220).

Almost surely, 2^20486210256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20486210256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29928553200).

20486210256 is an abundant number, since it is smaller than the sum of its proper divisors (39370896144).

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

20486210256 is a wasteful number, since it uses less digits than its factorization.

20486210256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35535 (or 35517 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

Adding to 20486210256 its reverse (65201268402), we get a palindrome (85687478658).

The spelling of 20486210256 in words is "twenty billion, four hundred eighty-six million, two hundred ten thousand, two hundred fifty-six".