20402212 has 12 divisors (see below), whose sum is σ = 35809200. Its totient is φ = 10171016.

The previous prime is 20402209. The next prime is 20402231. The reversal of 20402212 is 21220402.

It is a junction number, because it is equal to n+sod(n) for n = 20402192 and 20402201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5962 + ... + 8737.

It is an arithmetic number, because the mean of its divisors is an integer number (2984100).

Almost surely, 2^20402212 is an apocalyptic number.

It is an amenable number.

20402212 is a deficient number, since it is larger than the sum of its proper divisors (15406988).

20402212 is a wasteful number, since it uses less digits than its factorization.

20402212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15050 (or 15048 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 20402212 is about 4516.8807821327. The cubic root of 20402212 is about 273.2493171617.

Adding to 20402212 its reverse (21220402), we get a palindrome (41622614).

The spelling of 20402212 in words is "twenty million, four hundred two thousand, two hundred twelve".