20582340 has 48 divisors (see below), whose sum is σ = 58339008. Its totient is φ = 5421184.

The previous prime is 20582321. The next prime is 20582383. The reversal of 20582340 is 4328502.

It is a self number, because there is not a number n which added to its sum of digits gives 20582340.

It is a congruent number.

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, 2914 + ... + 7046.

It is an arithmetic number, because the mean of its divisors is an integer number (1215396).

Almost surely, 2^20582340 is an apocalyptic number.

20582340 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 20582340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29169504).

20582340 is an abundant number, since it is smaller than the sum of its proper divisors (37756668).

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

20582340 is a wasteful number, since it uses less digits than its factorization.

20582340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4228 (or 4226 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 20582340 is about 4536.7763885825. The cubic root of 20582340 is about 274.0511208717.

The spelling of 20582340 in words is "twenty million, five hundred eighty-two thousand, three hundred forty".