20216252 has 24 divisors (see below), whose sum is σ = 40666080. Its totient is φ = 8614080.

The previous prime is 20216243. The next prime is 20216263. The reversal of 20216252 is 25261202.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3074 + ... + 7062.

It is an arithmetic number, because the mean of its divisors is an integer number (1694420).

Almost surely, 2^20216252 is an apocalyptic number.

It is an amenable number.

20216252 is an abundant number, since it is smaller than the sum of its proper divisors (20449828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20216252 is a wasteful number, since it uses less digits than its factorization.

20216252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4181 (or 4179 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20216252 is about 4496.2486586042. The cubic root of 20216252 is about 272.4165869882.

Adding to 20216252 its reverse (25261202), we get a palindrome (45477454).

The spelling of 20216252 in words is "twenty million, two hundred sixteen thousand, two hundred fifty-two".