20453212 has 12 divisors (see below), whose sum is σ = 38546536. Its totient is φ = 9439920.

The previous prime is 20453203. The next prime is 20453269. The reversal of 20453212 is 21235402.

It is a super-2 number, since 2×20453212² = 836667762233888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20453212.

It is a congruent number.

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, 196614 + ... + 196717.

Almost surely, 2^20453212 is an apocalyptic number.

It is an amenable number.

20453212 is a deficient number, since it is larger than the sum of its proper divisors (18093324).

20453212 is a wasteful number, since it uses less digits than its factorization.

20453212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393348 (or 393346 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20453212 is about 4522.5227473170. The cubic root of 20453212 is about 273.4768107858.

Adding to 20453212 its reverse (21235402), we get a palindrome (41688614).

The spelling of 20453212 in words is "twenty million, four hundred fifty-three thousand, two hundred twelve".