20324340 has 36 divisors (see below), whose sum is σ = 61651044. Its totient is φ = 5419776.

The previous prime is 20324327. The next prime is 20324363. The reversal of 20324340 is 4342302.

20324340 is a `hidden beast` number, since 2 + 0 + 324 + 340 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12236004 + 8088336 = 3498^2 + 2844^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56277 + ... + 56636.

It is an arithmetic number, because the mean of its divisors is an integer number (1712529).

Almost surely, 2^20324340 is an apocalyptic number.

20324340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20324340 is an abundant number, since it is smaller than the sum of its proper divisors (41326704).

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

20324340 is a wasteful number, since it uses less digits than its factorization.

20324340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112928 (or 112923 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 20324340 is about 4508.2524330388. The cubic root of 20324340 is about 272.9012241779.

Adding to 20324340 its reverse (4342302), we get a palindrome (24666642).

The spelling of 20324340 in words is "twenty million, three hundred twenty-four thousand, three hundred forty".