23019040 has 144 divisors (see below), whose sum is σ = 63345240. Its totient is φ = 7884800.

The previous prime is 23018987. The next prime is 23019041. The reversal of 23019040 is 4091032.

It can be written as a sum of positive squares in 4 ways, for example, as 12702096 + 10316944 = 3564^2 + 3212^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23018999 and 23019017.

It is not an unprimeable number, because it can be changed into a prime (23019041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 561420 + ... + 561460.

Almost surely, 2^23019040 is an apocalyptic number.

23019040 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 23019040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31672620).

23019040 is an abundant number, since it is smaller than the sum of its proper divisors (40326200).

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

23019040 is a wasteful number, since it uses less digits than its factorization.

23019040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 23019040 is about 4797.8161698840. The cubic root of 23019040 is about 284.4651505832.

The spelling of 23019040 in words is "twenty-three million, nineteen thousand, forty".