23427030721 has 4 divisors (see below), whose sum is σ = 23468642352. Its totient is φ = 23385419092.

The previous prime is 23427030689. The next prime is 23427030733. The reversal of 23427030721 is 12703072432.

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 23427030721 - 2⁵ = 23427030689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23427030751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20804971 + ... + 20806096.

It is an arithmetic number, because the mean of its divisors is an integer number (5867160588).

Almost surely, 2^23427030721 is an apocalyptic number.

It is an amenable number.

23427030721 is a deficient number, since it is larger than the sum of its proper divisors (41611631).

23427030721 is an equidigital number, since it uses as much as digits as its factorization.

23427030721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41611630.

The product of its (nonzero) digits is 14112, while the sum is 31.

The spelling of 23427030721 in words is "twenty-three billion, four hundred twenty-seven million, thirty thousand, seven hundred twenty-one".