20325340 has 48 divisors (see below), whose sum is σ = 49984704. Its totient is φ = 6796800.

The previous prime is 20325337. The next prime is 20325379. The reversal of 20325340 is 4352302.

20325340 = 1701² + 1702² + ... + 1707².

It is a super-2 number, since 2×20325340² = 826238892231200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3970 + ... + 7510.

It is an arithmetic number, because the mean of its divisors is an integer number (1041348).

Almost surely, 2^20325340 is an apocalyptic number.

20325340 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 20325340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24992352).

20325340 is an abundant number, since it is smaller than the sum of its proper divisors (29659364).

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

20325340 is a wasteful number, since it uses less digits than its factorization.

20325340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3598 (or 3596 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 20325340 is about 4508.3633393949. The cubic root of 20325340 is about 272.9056998746.

Adding to 20325340 its reverse (4352302), we get a palindrome (24677642).

The spelling of 20325340 in words is "twenty million, three hundred twenty-five thousand, three hundred forty".