21224363615416 has 64 divisors (see below), whose sum is σ = 42977873232000. Its totient is φ = 9768211642368.

The previous prime is 21224363615369. The next prime is 21224363615419. The reversal of 21224363615416 is 61451636342212.

It is a super-2 number, since 2×21224363615416² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21224363615419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 519560560 + ... + 519601408.

It is an arithmetic number, because the mean of its divisors is an integer number (671529269250).

Almost surely, 2^{21224363615416} is an apocalyptic number.

21224363615416 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21224363615416 is an abundant number, since it is smaller than the sum of its proper divisors (21753509616584).

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

21224363615416 is a wasteful number, since it uses less digits than its factorization.

21224363615416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54848 (or 54844 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 46.

Adding to 21224363615416 its reverse (61451636342212), we get a palindrome (82675999957628).

The spelling of 21224363615416 in words is "twenty-one trillion, two hundred twenty-four billion, three hundred sixty-three million, six hundred fifteen thousand, four hundred sixteen".