20653212 has 24 divisors (see below), whose sum is σ = 48448512. Its totient is φ = 6847600.

The previous prime is 20653189. The next prime is 20653229. The reversal of 20653212 is 21235602.

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, 2214 + ... + 6797.

It is an arithmetic number, because the mean of its divisors is an integer number (2018688).

Almost surely, 2^20653212 is an apocalyptic number.

It is an amenable number.

20653212 is an abundant number, since it is smaller than the sum of its proper divisors (27795300).

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

20653212 is a wasteful number, since it uses less digits than its factorization.

20653212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9209 (or 9207 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20653212 is about 4544.5805086938. The cubic root of 20653212 is about 274.3653109455.

Adding to 20653212 its reverse (21235602), we get a palindrome (41888814).

The spelling of 20653212 in words is "twenty million, six hundred fifty-three thousand, two hundred twelve".