20023550 has 12 divisors (see below), whose sum is σ = 37243896. Its totient is φ = 8009400.

The previous prime is 20023537. The next prime is 20023561. The reversal of 20023550 is 5532002.

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 5 ways as a sum of consecutive naturals, for example, 200186 + ... + 200285.

It is an arithmetic number, because the mean of its divisors is an integer number (3103658).

Almost surely, 2^20023550 is an apocalyptic number.

20023550 is a deficient number, since it is larger than the sum of its proper divisors (17220346).

20023550 is a wasteful number, since it uses less digits than its factorization.

20023550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400483 (or 400478 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 20023550 is about 4474.7681504185. The cubic root of 20023550 is about 271.5482607610.

Adding to 20023550 its reverse (5532002), we get a palindrome (25555552).

The spelling of 20023550 in words is "twenty million, twenty-three thousand, five hundred fifty".