20323545 has 32 divisors (see below), whose sum is σ = 36443520. Its totient is φ = 9584640.

The previous prime is 20323531. The next prime is 20323547. The reversal of 20323545 is 54532302.

It is not a de Polignac number, because 20323545 - 2⁴ = 20323529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20323547) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 4441 + ... + 7769.

It is an arithmetic number, because the mean of its divisors is an integer number (1138860).

Almost surely, 2^20323545 is an apocalyptic number.

It is an amenable number.

20323545 is a deficient number, since it is larger than the sum of its proper divisors (16119975).

20323545 is a wasteful number, since it uses less digits than its factorization.

20323545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3385.

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 20323545 is about 4508.1642605389. The cubic root of 20323545 is about 272.8976658942.

Adding to 20323545 its reverse (54532302), we get a palindrome (74855847).

The spelling of 20323545 in words is "twenty million, three hundred twenty-three thousand, five hundred forty-five".