20216316402 has 24 divisors (see below), whose sum is σ = 43811943084. Its totient is φ = 6737245344.

The previous prime is 20216316397. The next prime is 20216316427. The reversal of 20216316402 is 20461361202.

20216316402 is a `hidden beast` number, since 2 + 0 + 2 + 16 + 3 + 1 + 640 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16770509001 + 3445807401 = 129501^2 + 58701^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44113 + ... + 205860.

Almost surely, 2^20216316402 is an apocalyptic number.

20216316402 is an abundant number, since it is smaller than the sum of its proper divisors (23595626682).

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

20216316402 is a wasteful number, since it uses less digits than its factorization.

20216316402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254474 (or 254471 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 20216316402 its reverse (20461361202), we get a palindrome (40677677604).

The spelling of 20216316402 in words is "twenty billion, two hundred sixteen million, three hundred sixteen thousand, four hundred two".