20013316 has 6 divisors (see below), whose sum is σ = 35023310. Its totient is φ = 10006656.

The previous prime is 20013313. The next prime is 20013319. The reversal of 20013316 is 61331002.

It is an interprime number because it is at equal distance from previous prime (20013313) and next prime (20013319).

It can be written as a sum of positive squares in only one way, i.e., 12744900 + 7268416 = 3570^2 + 2696^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20013316.

It is not an unprimeable number, because it can be changed into a prime (20013311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2501661 + ... + 2501668.

Almost surely, 2^20013316 is an apocalyptic number.

It is an amenable number.

20013316 is a deficient number, since it is larger than the sum of its proper divisors (15009994).

20013316 is a wasteful number, since it uses less digits than its factorization.

20013316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003333 (or 5003331 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 20013316 is about 4473.6244813350. The cubic root of 20013316 is about 271.5019902697.

Adding to 20013316 its reverse (61331002), we get a palindrome (81344318).

The spelling of 20013316 in words is "twenty million, thirteen thousand, three hundred sixteen".