20359221 has 4 divisors (see below), whose sum is σ = 27145632. Its totient is φ = 13572812.

The previous prime is 20359187. The next prime is 20359237. The reversal of 20359221 is 12295302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20359221 - 2¹³ = 20351029 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20359191 and 20359200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20359271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3393201 + ... + 3393206.

It is an arithmetic number, because the mean of its divisors is an integer number (6786408).

Almost surely, 2^20359221 is an apocalyptic number.

It is an amenable number.

20359221 is a deficient number, since it is larger than the sum of its proper divisors (6786411).

20359221 is an equidigital number, since it uses as much as digits as its factorization.

20359221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6786410.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 20359221 is about 4512.1193468258. The cubic root of 20359221 is about 273.0572542907.

The spelling of 20359221 in words is "twenty million, three hundred fifty-nine thousand, two hundred twenty-one".