20827313 has 4 divisors (see below), whose sum is σ = 22429428. Its totient is φ = 19225200.

The previous prime is 20827309. The next prime is 20827349. The reversal of 20827313 is 31372802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11235904 + 9591409 = 3352^2 + 3097^2 .

It is a cyclic number.

It is not a de Polignac number, because 20827313 - 2² = 20827309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20827013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 801038 + ... + 801063.

It is an arithmetic number, because the mean of its divisors is an integer number (5607357).

Almost surely, 2^20827313 is an apocalyptic number.

It is an amenable number.

20827313 is a deficient number, since it is larger than the sum of its proper divisors (1602115).

20827313 is a wasteful number, since it uses less digits than its factorization.

20827313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602114.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20827313 is about 4563.6951037509. The cubic root of 20827313 is about 275.1340965841.

The spelling of 20827313 in words is "twenty million, eight hundred twenty-seven thousand, three hundred thirteen".