20023535 has 32 divisors (see below), whose sum is σ = 29538432. Its totient is φ = 12718080.

The previous prime is 20023519. The next prime is 20023537. The reversal of 20023535 is 53532002.

It is not a de Polignac number, because 20023535 - 2⁴ = 20023519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023537) 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, 43205 + ... + 43665.

It is an arithmetic number, because the mean of its divisors is an integer number (923076).

Almost surely, 2^20023535 is an apocalyptic number.

20023535 is a deficient number, since it is larger than the sum of its proper divisors (9514897).

20023535 is a wasteful number, since it uses less digits than its factorization.

20023535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563.

The product of its (nonzero) digits is 900, while the sum is 20.

The square root of 20023535 is about 4474.7664743537. The cubic root of 20023535 is about 271.5481929537.

Adding to 20023535 its reverse (53532002), we get a palindrome (73555537).

The spelling of 20023535 in words is "twenty million, twenty-three thousand, five hundred thirty-five".