20212680 has 64 divisors (see below), whose sum is σ = 61041600. Its totient is φ = 5354240.

The previous prime is 20212667. The next prime is 20212691. The reversal of 20212680 is 8621202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21010 + ... + 21950.

It is an arithmetic number, because the mean of its divisors is an integer number (953775).

Almost surely, 2^20212680 is an apocalyptic number.

20212680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20212680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30520800).

20212680 is an abundant number, since it is smaller than the sum of its proper divisors (40828920).

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

20212680 is a wasteful number, since it uses less digits than its factorization.

20212680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134 (or 1130 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20212680 is about 4495.8514210325. The cubic root of 20212680 is about 272.4005416572.

Adding to 20212680 its reverse (8621202), we get a palindrome (28833882).

The spelling of 20212680 in words is "twenty million, two hundred twelve thousand, six hundred eighty".