23021040 has 160 divisors (see below), whose sum is σ = 83137536. Its totient is φ = 5160960.

The previous prime is 23021029. The next prime is 23021057. The reversal of 23021040 is 4012032.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119184 + ... + 119376.

Almost surely, 2^23021040 is an apocalyptic number.

23021040 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 23021040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41568768).

23021040 is an abundant number, since it is smaller than the sum of its proper divisors (60116496).

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

23021040 is a wasteful number, since it uses less digits than its factorization.

23021040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 23021040 is about 4798.0245935176. The cubic root of 23021040 is about 284.4733888912.

Adding to 23021040 its reverse (4012032), we get a palindrome (27033072).

The spelling of 23021040 in words is "twenty-three million, twenty-one thousand, forty".