23202010021 has 4 divisors (see below), whose sum is σ = 23202318700. Its totient is φ = 23201701344.

The previous prime is 23202009979. The next prime is 23202010033. The reversal of 23202010021 is 12001020232.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 12212681121 + 10989328900 = 110511^2 + 104830^2 .

It is a cyclic number.

It is not a de Polignac number, because 23202010021 - 2¹⁷ = 23201878949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23202009983 and 23202010010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23202010121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39865 + ... + 219073.

It is an arithmetic number, because the mean of its divisors is an integer number (5800579675).

Almost surely, 2^23202010021 is an apocalyptic number.

It is an amenable number.

23202010021 is a deficient number, since it is larger than the sum of its proper divisors (308679).

23202010021 is a wasteful number, since it uses less digits than its factorization.

23202010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308678.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 23202010021 its reverse (12001020232), we get a palindrome (35203030253).

The spelling of 23202010021 in words is "twenty-three billion, two hundred two million, ten thousand, twenty-one".