20212416 has 140 divisors (see below), whose sum is σ = 68598288. Its totient is φ = 5764608.

The previous prime is 20212399. The next prime is 20212417. The reversal of 20212416 is 61421202.

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 (20212417) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 36010 + ... + 36566.

Almost surely, 2^20212416 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 20212416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34299144).

20212416 is an abundant number, since it is smaller than the sum of its proper divisors (48385872).

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

20212416 is an equidigital number, since it uses as much as digits as its factorization.

20212416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588 (or 569 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 20212416 is about 4495.8220605358. The cubic root of 20212416 is about 272.3993557011.

Adding to 20212416 its reverse (61421202), we get a palindrome (81633618).

The spelling of 20212416 in words is "twenty million, two hundred twelve thousand, four hundred sixteen".