20801182 has 4 divisors (see below), whose sum is σ = 31201776. Its totient is φ = 10400590.

The previous prime is 20801171. The next prime is 20801191. The reversal of 20801182 is 28110802.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5200294 + ... + 5200297.

It is an arithmetic number, because the mean of its divisors is an integer number (7800444).

Almost surely, 2^20801182 is an apocalyptic number.

20801182 is a deficient number, since it is larger than the sum of its proper divisors (10400594).

20801182 is a wasteful number, since it uses less digits than its factorization.

20801182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10400593.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 20801182 is about 4560.8312838780. The cubic root of 20801182 is about 275.0189827117.

Adding to 20801182 its reverse (28110802), we get a palindrome (48911984).

The spelling of 20801182 in words is "twenty million, eight hundred one thousand, one hundred eighty-two".