20800215 has 24 divisors (see below), whose sum is σ = 36494640. Its totient is φ = 10957824.

The previous prime is 20800201. The next prime is 20800229. The reversal of 20800215 is 51200802.

It is an interprime number because it is at equal distance from previous prime (20800201) and next prime (20800229).

It is not a de Polignac number, because 20800215 - 2⁵ = 20800183 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 951 + ... + 6519.

It is an arithmetic number, because the mean of its divisors is an integer number (1520610).

Almost surely, 2^20800215 is an apocalyptic number.

20800215 is a deficient number, since it is larger than the sum of its proper divisors (15694425).

20800215 is a wasteful number, since it uses less digits than its factorization.

20800215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5663 (or 5660 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 20800215 is about 4560.7252712699. The cubic root of 20800215 is about 275.0147209750.

The spelling of 20800215 in words is "twenty million, eight hundred thousand, two hundred fifteen".