20857322 has 16 divisors (see below), whose sum is σ = 33121440. Its totient is φ = 9833712.

The previous prime is 20857321. The next prime is 20857357. The reversal of 20857322 is 22375802.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (20857321) 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 in 7 ways as a sum of consecutive naturals, for example, 1688 + ... + 6675.

It is an arithmetic number, because the mean of its divisors is an integer number (2070090).

Almost surely, 2^20857322 is an apocalyptic number.

20857322 is a deficient number, since it is larger than the sum of its proper divisors (12264118).

20857322 is a wasteful number, since it uses less digits than its factorization.

20857322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8437.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 20857322 is about 4566.9817166264. The cubic root of 20857322 is about 275.2661753409.

The spelling of 20857322 in words is "twenty million, eight hundred fifty-seven thousand, three hundred twenty-two".