20345382 has 12 divisors (see below), whose sum is σ = 44081700. Its totient is φ = 6781788.

The previous prime is 20345359. The next prime is 20345411. The reversal of 20345382 is 28354302.

20345382 is a `hidden beast` number, since 203 + 453 + 8 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 565132 + ... + 565167.

It is an arithmetic number, because the mean of its divisors is an integer number (3673475).

Almost surely, 2^20345382 is an apocalyptic number.

20345382 is an abundant number, since it is smaller than the sum of its proper divisors (23736318).

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

20345382 is a wasteful number, since it uses less digits than its factorization.

20345382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130307 (or 1130304 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 20345382 is about 4510.5855495711. The cubic root of 20345382 is about 272.9953708509.

Adding to 20345382 its reverse (28354302), we get a palindrome (48699684).

The spelling of 20345382 in words is "twenty million, three hundred forty-five thousand, three hundred eighty-two".