20324638 has 8 divisors (see below), whose sum is σ = 31196088. Its totient is φ = 9925944.

The previous prime is 20324609. The next prime is 20324641. The reversal of 20324638 is 83642302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118081 + ... + 118252.

It is an arithmetic number, because the mean of its divisors is an integer number (3899511).

Almost surely, 2^20324638 is an apocalyptic number.

20324638 is a deficient number, since it is larger than the sum of its proper divisors (10871450).

20324638 is a wasteful number, since it uses less digits than its factorization.

20324638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236378.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 20324638 is about 4508.2854834183. The cubic root of 20324638 is about 272.9025579509.

It can be divided in two parts, 2032 and 4638, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 20324638 in words is "twenty million, three hundred twenty-four thousand, six hundred thirty-eight".