21446830116 has 72 divisors (see below), whose sum is σ = 55432278720. Its totient is φ = 6989097024.

The previous prime is 21446830021. The next prime is 21446830123. The reversal of 21446830116 is 61103864412.

21446830116 is a `hidden beast` number, since 21 + 446 + 83 + 0 + 116 = 666.

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

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, 520105 + ... + 559823.

It is an arithmetic number, because the mean of its divisors is an integer number (769892760).

Almost surely, 2^21446830116 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 21446830116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27716139360).

21446830116 is an abundant number, since it is smaller than the sum of its proper divisors (33985448604).

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

21446830116 is a wasteful number, since it uses less digits than its factorization.

21446830116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40065 (or 40060 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 21446830116 in words is "twenty-one billion, four hundred forty-six million, eight hundred thirty thousand, one hundred sixteen".