21522062016 has 896 divisors, whose sum is σ = 84306216960. Its totient is φ = 5223481344.

The previous prime is 21522061997. The next prime is 21522062123. The reversal of 21522062016 is 61026022512.

21522062016 is a `hidden beast` number, since 2 + 1 + 5 + 2 + 20 + 620 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 221876880 + ... + 221876976.

It is an arithmetic number, because the mean of its divisors is an integer number (94091760).

Almost surely, 2^21522062016 is an apocalyptic number.

21522062016 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21522062016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42153108480).

21522062016 is an abundant number, since it is smaller than the sum of its proper divisors (62784154944).

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

21522062016 is a wasteful number, since it uses less digits than its factorization.

21522062016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 21522062016 its reverse (61026022512), we get a palindrome (82548084528).

The spelling of 21522062016 in words is "twenty-one billion, five hundred twenty-two million, sixty-two thousand, sixteen".