15421430823 has 4 divisors (see below), whose sum is σ = 20561907768. Its totient is φ = 10280953880.

The previous prime is 15421430771. The next prime is 15421430837. The reversal of 15421430823 is 32803412451.

15421430823 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 15421430823 - 2⁸ = 15421430567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15421430863) 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, 2570238468 + ... + 2570238473.

It is an arithmetic number, because the mean of its divisors is an integer number (5140476942).

Almost surely, 2^15421430823 is an apocalyptic number.

15421430823 is a deficient number, since it is larger than the sum of its proper divisors (5140476945).

15421430823 is an equidigital number, since it uses as much as digits as its factorization.

15421430823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5140476944.

The product of its (nonzero) digits is 23040, while the sum is 33.

The spelling of 15421430823 in words is "fifteen billion, four hundred twenty-one million, four hundred thirty thousand, eight hundred twenty-three".