20212402 has 12 divisors (see below), whose sum is σ = 35268750. Its totient is φ = 8662416.

The previous prime is 20212399. The next prime is 20212417. The reversal of 20212402 is 20421202.

It can be written as a sum of positive squares in only one way, i.e., 14447601 + 5764801 = 3801^2 + 2401^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 103027 + ... + 103222.

Almost surely, 2^20212402 is an apocalyptic number.

20212402 is a deficient number, since it is larger than the sum of its proper divisors (15056348).

20212402 is a wasteful number, since it uses less digits than its factorization.

20212402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206265 (or 206258 counting only the distinct ones).

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

The square root of 20212402 is about 4495.8205035344. The cubic root of 20212402 is about 272.3992928092.

Adding to 20212402 its reverse (20421202), we get a palindrome (40633604).

The spelling of 20212402 in words is "twenty million, two hundred twelve thousand, four hundred two".