20319316 has 6 divisors (see below), whose sum is σ = 35558810. Its totient is φ = 10159656.

The previous prime is 20319311. The next prime is 20319317. The reversal of 20319316 is 61391302.

It can be written as a sum of positive squares in only one way, i.e., 19891600 + 427716 = 4460^2 + 654^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20319311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2539911 + ... + 2539918.

Almost surely, 2^20319316 is an apocalyptic number.

It is an amenable number.

20319316 is a deficient number, since it is larger than the sum of its proper divisors (15239494).

20319316 is a wasteful number, since it uses less digits than its factorization.

20319316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5079833 (or 5079831 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 20319316 is about 4507.6951982138. The cubic root of 20319316 is about 272.8787360555.

The spelling of 20319316 in words is "twenty million, three hundred nineteen thousand, three hundred sixteen".