23010021 has 16 divisors (see below), whose sum is σ = 35265600. Its totient is φ = 14810544.

The previous prime is 23010017. The next prime is 23010037. The reversal of 23010021 is 12001032.

It is a happy number.

It is not a de Polignac number, because 23010021 - 2² = 23010017 is a prime.

It is a super-2 number, since 2×23010021² = 1058922132840882, which contains 22 as substring.

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 = 23009985 and 23010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23010521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13911 + ... + 15476.

It is an arithmetic number, because the mean of its divisors is an integer number (2204100).

Almost surely, 2^23010021 is an apocalyptic number.

It is an amenable number.

23010021 is a deficient number, since it is larger than the sum of its proper divisors (12255579).

23010021 is a wasteful number, since it uses less digits than its factorization.

23010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29425 (or 29419 counting only the distinct ones).

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

The square root of 23010021 is about 4796.8761710096. The cubic root of 23010021 is about 284.4279940042.

Adding to 23010021 its reverse (12001032), we get a palindrome (35011053).

The spelling of 23010021 in words is "twenty-three million, ten thousand, twenty-one".