23021532440345 has 4 divisors (see below), whose sum is σ = 27625838928420. Its totient is φ = 18417225952272.

The previous prime is 23021532440329. The next prime is 23021532440359. The reversal of 23021532440345 is 54304423512032.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17459519614681 + 5562012825664 = 4178459^2 + 2358392^2 .

It is a cyclic number.

It is not a de Polignac number, because 23021532440345 - 2⁴ = 23021532440329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23021532440299 and 23021532440308.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2302153244030 + ... + 2302153244039.

It is an arithmetic number, because the mean of its divisors is an integer number (6906459732105).

Almost surely, 2^{23021532440345} is an apocalyptic number.

It is an amenable number.

23021532440345 is a deficient number, since it is larger than the sum of its proper divisors (4604306488075).

23021532440345 is an equidigital number, since it uses as much as digits as its factorization.

23021532440345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4604306488074.

The product of its (nonzero) digits is 345600, while the sum is 38.

Adding to 23021532440345 its reverse (54304423512032), we get a palindrome (77325955952377).

The spelling of 23021532440345 in words is "twenty-three trillion, twenty-one billion, five hundred thirty-two million, four hundred forty thousand, three hundred forty-five".