20057559 has 8 divisors (see below), whose sum is σ = 28151040. Its totient is φ = 12667896.

The previous prime is 20057551. The next prime is 20057567. The reversal of 20057559 is 95575002.

It is an interprime number because it is at equal distance from previous prime (20057551) and next prime (20057567).

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

It is not a de Polignac number, because 20057559 - 2³ = 20057551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20057551) 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, 175887 + ... + 176000.

It is an arithmetic number, because the mean of its divisors is an integer number (3518880).

Almost surely, 2^20057559 is an apocalyptic number.

20057559 is a deficient number, since it is larger than the sum of its proper divisors (8093481).

20057559 is a wasteful number, since it uses less digits than its factorization.

20057559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351909.

The product of its (nonzero) digits is 15750, while the sum is 33.

The square root of 20057559 is about 4478.5666233740. The cubic root of 20057559 is about 271.7019108594.

The spelling of 20057559 in words is "twenty million, fifty-seven thousand, five hundred fifty-nine".