20862057 has 8 divisors (see below), whose sum is σ = 29280160. Its totient is φ = 13176000.

The previous prime is 20862041. The next prime is 20862059. The reversal of 20862057 is 75026802.

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

It is not a de Polignac number, because 20862057 - 2⁴ = 20862041 is a prime.

It is the 4568-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20862059) by changing a digit.

It is a nontrivial repunit in base 4567.

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, 182944 + ... + 183057.

It is an arithmetic number, because the mean of its divisors is an integer number (3660020).

Almost surely, 2^20862057 is an apocalyptic number.

It is an amenable number.

20862057 is a deficient number, since it is larger than the sum of its proper divisors (8418103).

20862057 is a wasteful number, since it uses less digits than its factorization.

20862057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366023.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 20862057 is about 4567.5000821018. The cubic root of 20862057 is about 275.2870039452.

Adding to 20862057 its reverse (75026802), we get a palindrome (95888859).

The spelling of 20862057 in words is "twenty million, eight hundred sixty-two thousand, fifty-seven".