20676520 has 48 divisors (see below), whose sum is σ = 47654460. Its totient is φ = 8073216.

The previous prime is 20676511. The next prime is 20676521. The reversal of 20676520 is 2567602.

It can be written as a sum of positive squares in 6 ways, for example, as 9746884 + 10929636 = 3122^2 + 3306^2 .

It is not an unprimeable number, because it can be changed into a prime (20676521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213112 + ... + 213208.

Almost surely, 2^20676520 is an apocalyptic number.

20676520 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 20676520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23827230).

20676520 is an abundant number, since it is smaller than the sum of its proper divisors (26977940).

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

20676520 is an equidigital number, since it uses as much as digits as its factorization.

20676520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 20676520 is about 4547.1441587001. The cubic root of 20676520 is about 274.4684829934.

The spelling of 20676520 in words is "twenty million, six hundred seventy-six thousand, five hundred twenty".