20133212 has 24 divisors (see below), whose sum is σ = 38610432. Its totient is φ = 9110000.

The previous prime is 20133199. The next prime is 20133247. The reversal of 20133212 is 21233102.

It is a happy number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10133 + ... + 11955.

It is an arithmetic number, because the mean of its divisors is an integer number (1608768).

Almost surely, 2^20133212 is an apocalyptic number.

20133212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20133212 is a deficient number, since it is larger than the sum of its proper divisors (18477220).

20133212 is a wasteful number, since it uses less digits than its factorization.

20133212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2089 (or 2087 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20133212 is about 4487.0047916177. The cubic root of 20133212 is about 272.0430835733.

Adding to 20133212 its reverse (21233102), we get a palindrome (41366314).

It can be divided in two parts, 2013 and 3212, that added together give a palindrome (5225).

The spelling of 20133212 in words is "twenty million, one hundred thirty-three thousand, two hundred twelve".