20350680 has 96 divisors (see below), whose sum is σ = 71040240. Its totient is φ = 4650240.

The previous prime is 20350679. The next prime is 20350709. The reversal of 20350680 is 8605302.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20350680.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4150 + ... + 7610.

Almost surely, 2^20350680 is an apocalyptic number.

20350680 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 20350680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35520120).

20350680 is an abundant number, since it is smaller than the sum of its proper divisors (50689560).

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

20350680 is a wasteful number, since it uses less digits than its factorization.

20350680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3489 (or 3478 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20350680 is about 4511.1727965131. The cubic root of 20350680 is about 273.0190650722.

Adding to 20350680 its reverse (8605302), we get a palindrome (28955982).

The spelling of 20350680 in words is "twenty million, three hundred fifty thousand, six hundred eighty".