23420021293 has 4 divisors (see below), whose sum is σ = 23448479008. Its totient is φ = 23391563580.

The previous prime is 23420021227. The next prime is 23420021327. The reversal of 23420021293 is 39212002432.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23420021293 - 2⁹ = 23420020781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23420021203) 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, 14227623 + ... + 14229268.

It is an arithmetic number, because the mean of its divisors is an integer number (5862119752).

Almost surely, 2^23420021293 is an apocalyptic number.

It is an amenable number.

23420021293 is a deficient number, since it is larger than the sum of its proper divisors (28457715).

23420021293 is an equidigital number, since it uses as much as digits as its factorization.

23420021293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28457714.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 23420021293 in words is "twenty-three billion, four hundred twenty million, twenty-one thousand, two hundred ninety-three".