21622546316 has 48 divisors (see below), whose sum is σ = 44255828736. Its totient is φ = 9051766464.

The previous prime is 21622546303. The next prime is 21622546327. The reversal of 21622546316 is 61364522612.

It is a self number, because there is not a number n which added to its sum of digits gives 21622546316.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304775 + ... + 368961.

It is an arithmetic number, because the mean of its divisors is an integer number (921996432).

Almost surely, 2^21622546316 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 21622546316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22127914368).

21622546316 is an abundant number, since it is smaller than the sum of its proper divisors (22633282420).

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

21622546316 is a wasteful number, since it uses less digits than its factorization.

21622546316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64478 (or 64476 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The spelling of 21622546316 in words is "twenty-one billion, six hundred twenty-two million, five hundred forty-six thousand, three hundred sixteen".