20328575 has 12 divisors (see below), whose sum is σ = 26534760. Its totient is φ = 15406560.

The previous prime is 20328569. The next prime is 20328589. The reversal of 20328575 is 57582302.

It is not a de Polignac number, because 20328575 - 2¹⁴ = 20312191 is a prime.

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, 20924 + ... + 21873.

It is an arithmetic number, because the mean of its divisors is an integer number (2211230).

Almost surely, 2^20328575 is an apocalyptic number.

20328575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20328575 is a deficient number, since it is larger than the sum of its proper divisors (6206185).

20328575 is a wasteful number, since it uses less digits than its factorization.

20328575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42826 (or 42821 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 20328575 is about 4508.7221027693. The cubic root of 20328575 is about 272.9201777481.

The spelling of 20328575 in words is "twenty million, three hundred twenty-eight thousand, five hundred seventy-five".