21830486256 has 120 divisors (see below), whose sum is σ = 63596398320. Its totient is φ = 7249430016.

The previous prime is 21830486243. The next prime is 21830486269. The reversal of 21830486256 is 65268403812.

21830486256 is a `hidden beast` number, since 2 + 18 + 3 + 0 + 4 + 8 + 625 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (21830486243) and next prime (21830486269).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1035436 + ... + 1056308.

It is an arithmetic number, because the mean of its divisors is an integer number (529969986).

Almost surely, 2^21830486256 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 21830486256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31798199160).

21830486256 is an abundant number, since it is smaller than the sum of its proper divisors (41765912064).

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

21830486256 is a wasteful number, since it uses less digits than its factorization.

21830486256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21165 (or 21147 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 21830486256 in words is "twenty-one billion, eight hundred thirty million, four hundred eighty-six thousand, two hundred fifty-six".