23021010 has 80 divisors (see below), whose sum is σ = 62752536. Its totient is φ = 6054912.

The previous prime is 23020997. The next prime is 23021029. The reversal of 23021010 is 1012032.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21986721 + 1034289 = 4689^2 + 1017^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 23020983 and 23021001.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 78424 + ... + 78716.

Almost surely, 2^23021010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23021010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31376268).

23021010 is an abundant number, since it is smaller than the sum of its proper divisors (39731526).

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

23021010 is a wasteful number, since it uses less digits than its factorization.

23021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 23021010 is about 4798.0214672300. The cubic root of 23021010 is about 284.4732653201.

Adding to 23021010 its reverse (1012032), we get a palindrome (24033042).

The spelling of 23021010 in words is "twenty-three million, twenty-one thousand, ten".