23886156421 has 4 divisors (see below), whose sum is σ = 24468745644. Its totient is φ = 23303567200.

The previous prime is 23886156409. The next prime is 23886156457. The reversal of 23886156421 is 12465168832.

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 1059177025 + 22826979396 = 32545^2 + 151086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23886156421 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 (23886156491) 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, 291294550 + ... + 291294631.

It is an arithmetic number, because the mean of its divisors is an integer number (6117186411).

Almost surely, 2^23886156421 is an apocalyptic number.

It is an amenable number.

23886156421 is a deficient number, since it is larger than the sum of its proper divisors (582589223).

23886156421 is an equidigital number, since it uses as much as digits as its factorization.

23886156421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582589222.

The product of its digits is 552960, while the sum is 46.

The spelling of 23886156421 in words is "twenty-three billion, eight hundred eighty-six million, one hundred fifty-six thousand, four hundred twenty-one".