20559393 has 8 divisors (see below), whose sum is σ = 30458400. Its totient is φ = 13706244.

The previous prime is 20559377. The next prime is 20559397. The reversal of 20559393 is 39395502.

It is not a de Polignac number, because 20559393 - 2⁴ = 20559377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20559397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380703 + ... + 380756.

It is an arithmetic number, because the mean of its divisors is an integer number (3807300).

Almost surely, 2^20559393 is an apocalyptic number.

It is an amenable number.

20559393 is a deficient number, since it is larger than the sum of its proper divisors (9899007).

20559393 is an equidigital number, since it uses as much as digits as its factorization.

20559393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761468 (or 761462 counting only the distinct ones).

The product of its (nonzero) digits is 36450, while the sum is 36.

The square root of 20559393 is about 4534.2466849522. The cubic root of 20559393 is about 273.9492375814.

The spelling of 20559393 in words is "twenty million, five hundred fifty-nine thousand, three hundred ninety-three".