20023580 has 24 divisors (see below), whose sum is σ = 43076880. Its totient is φ = 7813760.

The previous prime is 20023573. The next prime is 20023583. The reversal of 20023580 is 8532002.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11390 + ... + 13029.

It is an arithmetic number, because the mean of its divisors is an integer number (1794870).

Almost surely, 2^20023580 is an apocalyptic number.

20023580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20023580 is an abundant number, since it is smaller than the sum of its proper divisors (23053300).

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

20023580 is a wasteful number, since it uses less digits than its factorization.

20023580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24469 (or 24467 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20023580 is about 4474.7715025462. The cubic root of 20023580 is about 271.5483963754.

Adding to 20023580 its reverse (8532002), we get a palindrome (28555582).

The spelling of 20023580 in words is "twenty million, twenty-three thousand, five hundred eighty".