20231504 has 40 divisors (see below), whose sum is σ = 41976480. Its totient is φ = 9417600.

The previous prime is 20231503. The next prime is 20231507. The reversal of 20231504 is 40513202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20231503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17999 + ... + 19089.

It is an arithmetic number, because the mean of its divisors is an integer number (1049412).

Almost surely, 2^20231504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20231504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20988240).

20231504 is an abundant number, since it is smaller than the sum of its proper divisors (21744976).

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

20231504 is a wasteful number, since it uses less digits than its factorization.

20231504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179 (or 1173 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20231504 is about 4497.9444193987. The cubic root of 20231504 is about 272.4850773188.

Adding to 20231504 its reverse (40513202), we get a palindrome (60744706).

The spelling of 20231504 in words is "twenty million, two hundred thirty-one thousand, five hundred four".