20316402 has 24 divisors (see below), whose sum is σ = 45094140. Its totient is φ = 6606720.

The previous prime is 20316391. The next prime is 20316409. The reversal of 20316402 is 20461302.

It is a happy number.

20316402 is a `hidden beast` number, since 20 + 3 + 1 + 640 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17816841 + 2499561 = 4221^2 + 1581^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20316409) 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, 13027 + ... + 14502.

Almost surely, 2^20316402 is an apocalyptic number.

20316402 is an abundant number, since it is smaller than the sum of its proper divisors (24777738).

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

20316402 is a wasteful number, since it uses less digits than its factorization.

20316402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27578 (or 27575 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20316402 is about 4507.3719615758. The cubic root of 20316402 is about 272.8656908878.

Adding to 20316402 its reverse (20461302), we get a palindrome (40777704).

The spelling of 20316402 in words is "twenty million, three hundred sixteen thousand, four hundred two".