20023560 has 48 divisors (see below), whose sum is σ = 65077740. Its totient is φ = 5339520.

The previous prime is 20023537. The next prime is 20023561. The reversal of 20023560 is 6532002.

It can be written as a sum of positive squares in 2 ways, for example, as 17791524 + 2232036 = 4218^2 + 1494^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20023561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27451 + ... + 28170.

Almost surely, 2^20023560 is an apocalyptic number.

20023560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20023560 is an abundant number, since it is smaller than the sum of its proper divisors (45054180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20023560 is a wasteful number, since it uses less digits than its factorization.

20023560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55638 (or 55631 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20023560 is about 4474.7692677947. The cubic root of 20023560 is about 271.5483059658.

Adding to 20023560 its reverse (6532002), we get a palindrome (26555562).

The spelling of 20023560 in words is "twenty million, twenty-three thousand, five hundred sixty".