10023320021 has 16 divisors (see below), whose sum is σ = 12395423040. Its totient is φ = 7968481920.

The previous prime is 10023319987. The next prime is 10023320089. The reversal of 10023320021 is 12002332001.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 10023320021 - 2¹⁴ = 10023303637 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10023319978 and 10023320005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10083320021) 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, 1841840 + ... + 1847273.

It is an arithmetic number, because the mean of its divisors is an integer number (774713940).

Almost surely, 2^10023320021 is an apocalyptic number.

10023320021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10023320021 is a deficient number, since it is larger than the sum of its proper divisors (2372103019).

10023320021 is a wasteful number, since it uses less digits than its factorization.

10023320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3689156.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 10023320021 its reverse (12002332001), we get a palindrome (22025652022).

The spelling of 10023320021 in words is "ten billion, twenty-three million, three hundred twenty thousand, twenty-one".