21416224530 has 128 divisors (see below), whose sum is σ = 52757692416. Its totient is φ = 5562835200.

The previous prime is 21416224513. The next prime is 21416224537. The reversal of 21416224530 is 3542261412.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (21416224537) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 77314752 + ... + 77315028.

It is an arithmetic number, because the mean of its divisors is an integer number (412169472).

Almost surely, 2^21416224530 is an apocalyptic number.

21416224530 is an abundant number, since it is smaller than the sum of its proper divisors (31341467886).

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

21416224530 is a wasteful number, since it uses less digits than its factorization.

21416224530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 21416224530 its reverse (3542261412), we get a palindrome (24958485942).

The spelling of 21416224530 in words is "twenty-one billion, four hundred sixteen million, two hundred twenty-four thousand, five hundred thirty".