23420021305 has 8 divisors (see below), whose sum is σ = 28499857344. Its totient is φ = 18472129200.

The previous prime is 23420021227. The next prime is 23420021327. The reversal of 23420021305 is 50312002432.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23420021305 - 2¹⁷ = 23419890233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 32985591 + ... + 32986300.

It is an arithmetic number, because the mean of its divisors is an integer number (3562482168).

Almost surely, 2^23420021305 is an apocalyptic number.

It is an amenable number.

23420021305 is a deficient number, since it is larger than the sum of its proper divisors (5079836039).

23420021305 is an equidigital number, since it uses as much as digits as its factorization.

23420021305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65971967.

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 23420021305 its reverse (50312002432), we get a palindrome (73732023737).

The spelling of 23420021305 in words is "twenty-three billion, four hundred twenty million, twenty-one thousand, three hundred five".