21416207346 has 24 divisors (see below), whose sum is σ = 46470756540. Its totient is φ = 7128124416.

The previous prime is 21416207339. The next prime is 21416207347. The reversal of 21416207346 is 64370261412.

21416207346 is a `hidden beast` number, since 2 + 1 + 416 + 207 + 34 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19766954025 + 1649253321 = 140595^2 + 40611^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21416207346.

It is not an unprimeable number, because it can be changed into a prime (21416207347) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 871831 + ... + 896058.

Almost surely, 2^21416207346 is an apocalyptic number.

21416207346 is an abundant number, since it is smaller than the sum of its proper divisors (25054549194).

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

21416207346 is a wasteful number, since it uses less digits than its factorization.

21416207346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768570 (or 1768567 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

Adding to 21416207346 its reverse (64370261412), we get a palindrome (85786468758).

The spelling of 21416207346 in words is "twenty-one billion, four hundred sixteen million, two hundred seven thousand, three hundred forty-six".