23021000 has 32 divisors (see below), whose sum is σ = 53871480. Its totient is φ = 9208000.

The previous prime is 23020997. The next prime is 23021029. The reversal of 23021000 is 12032.

It can be written as a sum of positive squares in 4 ways, for example, as 2896804 + 20124196 = 1702^2 + 4486^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10511 + ... + 12510.

Almost surely, 2^23021000 is an apocalyptic number.

23021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23021000 is an abundant number, since it is smaller than the sum of its proper divisors (30850480).

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

23021000 is a wasteful number, since it uses less digits than its factorization.

23021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23042 (or 23028 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 23021000 is about 4798.0204251337. The cubic root of 23021000 is about 284.4732241298.

Adding to 23021000 its reverse (12032), we get a palindrome (23033032).

The spelling of 23021000 in words is "twenty-three million, twenty-one thousand".