20822957 has 16 divisors (see below), whose sum is σ = 22438080. Its totient is φ = 19286400.

The previous prime is 20822941. The next prime is 20822969. The reversal of 20822957 is 75922802.

It is not a de Polignac number, because 20822957 - 2⁴ = 20822941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20822987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98582 + ... + 98792.

It is an arithmetic number, because the mean of its divisors is an integer number (1402380).

Almost surely, 2^20822957 is an apocalyptic number.

It is an amenable number.

20822957 is a deficient number, since it is larger than the sum of its proper divisors (1615123).

20822957 is a wasteful number, since it uses less digits than its factorization.

20822957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 20822957 is about 4563.2178339413. The cubic root of 20822957 is about 275.1149139578.

The spelling of 20822957 in words is "twenty million, eight hundred twenty-two thousand, nine hundred fifty-seven".