20782313 has 8 divisors (see below), whose sum is σ = 22044960. Its totient is φ = 19524160.

The previous prime is 20782303. The next prime is 20782327. The reversal of 20782313 is 31328702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20782313 - 2¹⁴ = 20765929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20782303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15878 + ... + 17136.

It is an arithmetic number, because the mean of its divisors is an integer number (2755620).

Almost surely, 2^20782313 is an apocalyptic number.

It is an amenable number.

20782313 is a deficient number, since it is larger than the sum of its proper divisors (1262647).

20782313 is a wasteful number, since it uses less digits than its factorization.

20782313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2247.

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

The square root of 20782313 is about 4558.7622223582. The cubic root of 20782313 is about 274.9357998894.

The spelling of 20782313 in words is "twenty million, seven hundred eighty-two thousand, three hundred thirteen".