20023120 has 60 divisors (see below), whose sum is σ = 50444316. Its totient is φ = 7388160.

The previous prime is 20023063. The next prime is 20023121. The reversal of 20023120 is 2132002.

It can be written as a sum of positive squares in 6 ways, for example, as 4562496 + 15460624 = 2136^2 + 3932^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20023097 and 20023106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023121) 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, 12780 + ... + 14260.

Almost surely, 2^20023120 is an apocalyptic number.

20023120 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 20023120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25222158).

20023120 is an abundant number, since it is smaller than the sum of its proper divisors (30421196).

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

20023120 is a wasteful number, since it uses less digits than its factorization.

20023120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520 (or 1501 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 20023120 is about 4474.7201029785. The cubic root of 20023120 is about 271.5463169400.

Adding to 20023120 its reverse (2132002), we get a palindrome (22155122).

The spelling of 20023120 in words is "twenty million, twenty-three thousand, one hundred twenty".