20703212 has 12 divisors (see below), whose sum is σ = 38361960. Its totient is φ = 9742656.

The previous prime is 20703211. The next prime is 20703223. The reversal of 20703212 is 21230702.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (20703211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152162 + ... + 152297.

It is an arithmetic number, because the mean of its divisors is an integer number (3196830).

Almost surely, 2^20703212 is an apocalyptic number.

It is an amenable number.

20703212 is a deficient number, since it is larger than the sum of its proper divisors (17658748).

20703212 is a wasteful number, since it uses less digits than its factorization.

20703212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304480 (or 304478 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 20703212 is about 4550.0782410855. The cubic root of 20703212 is about 274.5865390058.

Adding to 20703212 its reverse (21230702), we get a palindrome (41933914).

The spelling of 20703212 in words is "twenty million, seven hundred three thousand, two hundred twelve".