20344212 has 108 divisors (see below), whose sum is σ = 63073920. Its totient is φ = 5497632.

The previous prime is 20344211. The next prime is 20344249. The reversal of 20344212 is 21244302.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20344211) 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 35 ways as a sum of consecutive naturals, for example, 33213 + ... + 33819.

Almost surely, 2^20344212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20344212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31536960).

20344212 is an abundant number, since it is smaller than the sum of its proper divisors (42729708).

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

20344212 is a wasteful number, since it uses less digits than its factorization.

20344212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 20344212 is about 4510.4558527936. The cubic root of 20344212 is about 272.9901377108.

Adding to 20344212 its reverse (21244302), we get a palindrome (41588514).

The spelling of 20344212 in words is "twenty million, three hundred forty-four thousand, two hundred twelve".