21829056522 has 128 divisors (see below), whose sum is σ = 56702177280. Its totient is φ = 5444651520.

The previous prime is 21829056427. The next prime is 21829056541. The reversal of 21829056522 is 22565092812.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1107897 + ... + 1127427.

It is an arithmetic number, because the mean of its divisors is an integer number (442985760).

Almost surely, 2^21829056522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21829056522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28351088640).

21829056522 is an abundant number, since it is smaller than the sum of its proper divisors (34873120758).

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

21829056522 is a wasteful number, since it uses less digits than its factorization.

21829056522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19668.

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 21829056522 in words is "twenty-one billion, eight hundred twenty-nine million, fifty-six thousand, five hundred twenty-two".