20153212 has 12 divisors (see below), whose sum is σ = 35315280. Its totient is φ = 10063136.

The previous prime is 20153209. The next prime is 20153213. The reversal of 20153212 is 21235102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20153213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 489 + ... + 6367.

It is an arithmetic number, because the mean of its divisors is an integer number (2942940).

Almost surely, 2^20153212 is an apocalyptic number.

It is an amenable number.

20153212 is a deficient number, since it is larger than the sum of its proper divisors (15162068).

20153212 is a wasteful number, since it uses less digits than its factorization.

20153212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6740 (or 6738 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20153212 is about 4489.2328966094. The cubic root of 20153212 is about 272.1331347956.

Adding to 20153212 its reverse (21235102), we get a palindrome (41388314).

The spelling of 20153212 in words is "twenty million, one hundred fifty-three thousand, two hundred twelve".