20882813 has 8 divisors (see below), whose sum is σ = 24689280. Its totient is φ = 17282160.

The previous prime is 20882777. The next prime is 20882857. The reversal of 20882813 is 31828802.

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

It is not a de Polignac number, because 20882813 - 2¹⁸ = 20620669 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20882813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20882893) 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, 51233 + ... + 51638.

It is an arithmetic number, because the mean of its divisors is an integer number (3086160).

Almost surely, 2^20882813 is an apocalyptic number.

It is an amenable number.

20882813 is a deficient number, since it is larger than the sum of its proper divisors (3806467).

20882813 is a wasteful number, since it uses less digits than its factorization.

20882813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102907.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 20882813 is about 4569.7716573151. The cubic root of 20882813 is about 275.3782695247.

The spelling of 20882813 in words is "twenty million, eight hundred eighty-two thousand, eight hundred thirteen".