20812922 has 8 divisors (see below), whose sum is σ = 33620916. Its totient is φ = 9605952.

The previous prime is 20812921. The next prime is 20812931. The reversal of 20812922 is 22921802.

It can be written as a sum of positive squares in 2 ways, for example, as 20802721 + 10201 = 4561^2 + 101^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 800497 = 20812922 / (2 + 0 + 8 + 1 + 2 + 9 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 20812891 and 20812900.

It is not an unprimeable number, because it can be changed into a prime (20812921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400223 + ... + 400274.

Almost surely, 2^20812922 is an apocalyptic number.

20812922 is a deficient number, since it is larger than the sum of its proper divisors (12807994).

20812922 is a wasteful number, since it uses less digits than its factorization.

20812922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800512.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 20812922 is about 4562.1181484043. The cubic root of 20812922 is about 275.0707123943.

The spelling of 20812922 in words is "twenty million, eight hundred twelve thousand, nine hundred twenty-two".