21214024314516 has 54 divisors (see below), whose sum is σ = 58942455539786. Its totient is φ = 6428492215200.

The previous prime is 21214024314491. The next prime is 21214024314517. The reversal of 21214024314516 is 61541342041212.

21214024314516 is a `hidden beast` number, since 2 + 1 + 214 + 0 + 2 + 431 + 4 + 5 + 1 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17056487002500 + 4157537312016 = 4129950^2 + 2039004^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214024314517) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2435030575 + ... + 2435039286.

Almost surely, 2^{21214024314516} is an apocalyptic number.

It is an amenable number.

21214024314516 is an abundant number, since it is smaller than the sum of its proper divisors (37728431225270).

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

21214024314516 is a wasteful number, since it uses less digits than its factorization.

21214024314516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4870069893 (or 4870069877 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

Adding to 21214024314516 its reverse (61541342041212), we get a palindrome (82755366355728).

The spelling of 21214024314516 in words is "twenty-one trillion, two hundred fourteen billion, twenty-four million, three hundred fourteen thousand, five hundred sixteen".