20328735 has 16 divisors (see below), whose sum is σ = 37172736. Its totient is φ = 9293088.

The previous prime is 20328713. The next prime is 20328767. The reversal of 20328735 is 53782302.

It is not a de Polignac number, because 20328735 - 2⁸ = 20328479 is a prime.

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, 96699 + ... + 96908.

It is an arithmetic number, because the mean of its divisors is an integer number (2323296).

Almost surely, 2^20328735 is an apocalyptic number.

20328735 is a deficient number, since it is larger than the sum of its proper divisors (16844001).

20328735 is a wasteful number, since it uses less digits than its factorization.

20328735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193622.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 20328735 is about 4508.7398461211. The cubic root of 20328735 is about 272.9208937700.

The spelling of 20328735 in words is "twenty million, three hundred twenty-eight thousand, seven hundred thirty-five".