20532229 has 4 divisors (see below), whose sum is σ = 20544876. Its totient is φ = 20519584.

The previous prime is 20532227. The next prime is 20532233. The reversal of 20532229 is 92223502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9443329 + 11088900 = 3073^2 + 3330^2 .

It is a cyclic number.

It is not a de Polignac number, because 20532229 - 2¹ = 20532227 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20532227) 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, 3454 + ... + 7279.

It is an arithmetic number, because the mean of its divisors is an integer number (5136219).

Almost surely, 2^20532229 is an apocalyptic number.

It is an amenable number.

20532229 is a deficient number, since it is larger than the sum of its proper divisors (12647).

20532229 is a wasteful number, since it uses less digits than its factorization.

20532229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12646.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20532229 is about 4531.2502689655. The cubic root of 20532229 is about 273.8285330309.

The spelling of 20532229 in words is "twenty million, five hundred thirty-two thousand, two hundred twenty-nine".