20023960 has 64 divisors (see below), whose sum is σ = 52060320. Its totient is φ = 6850560.

The previous prime is 20023933. The next prime is 20023981. The reversal of 20023960 is 6932002.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6142 + ... + 8818.

Almost surely, 2^20023960 is an apocalyptic number.

20023960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20023960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26030160).

20023960 is an abundant number, since it is smaller than the sum of its proper divisors (32036360).

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

20023960 is a wasteful number, since it uses less digits than its factorization.

20023960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2716 (or 2712 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 20023960 is about 4474.8139626134. The cubic root of 20023960 is about 271.5501141457.

Adding to 20023960 its reverse (6932002), we get a palindrome (26955962).

The spelling of 20023960 in words is "twenty million, twenty-three thousand, nine hundred sixty".