20213112 has 48 divisors (see below), whose sum is σ = 53355240. Its totient is φ = 6380352.

The previous prime is 20213107. The next prime is 20213183. The reversal of 20213112 is 21131202.

It is a Harshad number since it is a multiple of its sum of digits (12).

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 11 ways as a sum of consecutive naturals, for example, 7498 + ... + 9830.

Almost surely, 2^20213112 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 20213112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26677620).

20213112 is an abundant number, since it is smaller than the sum of its proper divisors (33142128).

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

20213112 is a wasteful number, since it uses less digits than its factorization.

20213112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380 (or 2357 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 20213112 is about 4495.8994650681. The cubic root of 20213112 is about 272.4024822905.

Adding to 20213112 its reverse (21131202), we get a palindrome (41344314).

The spelling of 20213112 in words is "twenty million, two hundred thirteen thousand, one hundred twelve".