20424212 has 6 divisors (see below), whose sum is σ = 35742378. Its totient is φ = 10212104.

The previous prime is 20424199. The next prime is 20424247. The reversal of 20424212 is 21242402.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17023876 + 3400336 = 4126^2 + 1844^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2553023 + ... + 2553030.

It is an arithmetic number, because the mean of its divisors is an integer number (5957063).

Almost surely, 2^20424212 is an apocalyptic number.

It is an amenable number.

20424212 is a deficient number, since it is larger than the sum of its proper divisors (15318166).

20424212 is a wasteful number, since it uses less digits than its factorization.

20424212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5106057 (or 5106055 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 20424212 is about 4519.3154348861. The cubic root of 20424212 is about 273.3474981092.

Adding to 20424212 its reverse (21242402), we get a palindrome (41666614).

The spelling of 20424212 in words is "twenty million, four hundred twenty-four thousand, two hundred twelve".