20059857 has 12 divisors (see below), whose sum is σ = 29072004. Its totient is φ = 13328640.

The previous prime is 20059849. The next prime is 20059861. The reversal of 20059857 is 75895002.

It can be written as a sum of positive squares in 2 ways, for example, as 266256 + 19793601 = 516^2 + 4449^2 .

It is not a de Polignac number, because 20059857 - 2³ = 20059849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20059807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 744 + ... + 6377.

It is an arithmetic number, because the mean of its divisors is an integer number (2422667).

Almost surely, 2^20059857 is an apocalyptic number.

It is an amenable number.

20059857 is a deficient number, since it is larger than the sum of its proper divisors (9012147).

20059857 is a wasteful number, since it uses less digits than its factorization.

20059857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7440 (or 7437 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 20059857 is about 4478.8231713253. The cubic root of 20059857 is about 271.7122867838.

The spelling of 20059857 in words is "twenty million, fifty-nine thousand, eight hundred fifty-seven".