20680922 has 4 divisors (see below), whose sum is σ = 31021386. Its totient is φ = 10340460.

The previous prime is 20680903. The next prime is 20680927. The reversal of 20680922 is 22908602.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 19722481 + 958441 = 4441^2 + 979^2 .

It is not an unprimeable number, because it can be changed into a prime (20680927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5170229 + ... + 5170232.

Almost surely, 2^20680922 is an apocalyptic number.

20680922 is a deficient number, since it is larger than the sum of its proper divisors (10340464).

20680922 is a wasteful number, since it uses less digits than its factorization.

20680922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10340463.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 20680922 is about 4547.6281730150. The cubic root of 20680922 is about 274.4879595870.

The spelling of 20680922 in words is "twenty million, six hundred eighty thousand, nine hundred twenty-two".