20432205 has 24 divisors (see below), whose sum is σ = 35544600. Its totient is φ = 10857600.

The previous prime is 20432183. The next prime is 20432233. The reversal of 20432205 is 50223402.

It can be written as a sum of positive squares in 4 ways, for example, as 101124 + 20331081 = 318^2 + 4509^2 .

It is not a de Polignac number, because 20432205 - 2⁵ = 20432173 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15055 + ... + 16355.

It is an arithmetic number, because the mean of its divisors is an integer number (1481025).

Almost surely, 2^20432205 is an apocalyptic number.

It is an amenable number.

20432205 is a deficient number, since it is larger than the sum of its proper divisors (15112395).

20432205 is a wasteful number, since it uses less digits than its factorization.

20432205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661 (or 1658 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20432205 is about 4520.1996637317. The cubic root of 20432205 is about 273.3831515712.

Adding to 20432205 its reverse (50223402), we get a palindrome (70655607).

The spelling of 20432205 in words is "twenty million, four hundred thirty-two thousand, two hundred five".