20315277 has 12 divisors (see below), whose sum is σ = 29475420. Its totient is φ = 13483008.

The previous prime is 20315263. The next prime is 20315287. The reversal of 20315277 is 77251302.

It can be written as a sum of positive squares in 2 ways, for example, as 13995081 + 6320196 = 3741^2 + 2514^2 .

It is not a de Polignac number, because 20315277 - 2¹⁰ = 20314253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20315277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315227) 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, 2868 + ... + 6989.

It is an arithmetic number, because the mean of its divisors is an integer number (2456285).

Almost surely, 2^20315277 is an apocalyptic number.

It is an amenable number.

20315277 is a deficient number, since it is larger than the sum of its proper divisors (9160143).

20315277 is a wasteful number, since it uses less digits than its factorization.

20315277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10092 (or 10089 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 20315277 is about 4507.2471642900. The cubic root of 20315277 is about 272.8606542419.

Adding to 20315277 its reverse (77251302), we get a palindrome (97566579).

The spelling of 20315277 in words is "twenty million, three hundred fifteen thousand, two hundred seventy-seven".