20800862 has 4 divisors (see below), whose sum is σ = 31201296. Its totient is φ = 10400430.

The previous prime is 20800861. The next prime is 20800867. The reversal of 20800862 is 26800802.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20800861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5200214 + ... + 5200217.

It is an arithmetic number, because the mean of its divisors is an integer number (7800324).

Almost surely, 2^20800862 is an apocalyptic number.

20800862 is a deficient number, since it is larger than the sum of its proper divisors (10400434).

20800862 is a wasteful number, since it uses less digits than its factorization.

20800862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10400433.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 20800862 is about 4560.7962024190. The cubic root of 20800862 is about 275.0175724308.

The spelling of 20800862 in words is "twenty million, eight hundred thousand, eight hundred sixty-two".