20430224 has 10 divisors (see below), whose sum is σ = 39583590. Its totient is φ = 10215104.

The previous prime is 20430191. The next prime is 20430251. The reversal of 20430224 is 42203402.

It can be written as a sum of positive squares in only one way, i.e., 11833600 + 8596624 = 3440^2 + 2932^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638429 + ... + 638460.

It is an arithmetic number, because the mean of its divisors is an integer number (3958359).

Almost surely, 2^20430224 is an apocalyptic number.

It is an amenable number.

20430224 is a deficient number, since it is larger than the sum of its proper divisors (19153366).

20430224 is a wasteful number, since it uses less digits than its factorization.

20430224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276897 (or 1276891 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 20430224 is about 4519.9805309315. The cubic root of 20430224 is about 273.3743160176.

Adding to 20430224 its reverse (42203402), we get a palindrome (62633626).

The spelling of 20430224 in words is "twenty million, four hundred thirty thousand, two hundred twenty-four".