15423454421003 has 4 divisors (see below), whose sum is σ = 15436716205848. Its totient is φ = 15410192636160.

The previous prime is 15423454420991. The next prime is 15423454421051. The reversal of 15423454421003 is 30012445432451.

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 15423454421003 - 2²⁴ = 15423437643787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15423454421503) 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, 6630890678 + ... + 6630893003.

It is an arithmetic number, because the mean of its divisors is an integer number (3859179051462).

Almost surely, 2^{15423454421003} is an apocalyptic number.

15423454421003 is a deficient number, since it is larger than the sum of its proper divisors (13261784845).

15423454421003 is a wasteful number, since it uses less digits than its factorization.

15423454421003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13261784844.

The product of its (nonzero) digits is 230400, while the sum is 38.

Adding to 15423454421003 its reverse (30012445432451), we get a palindrome (45435899853454).

The spelling of 15423454421003 in words is "fifteen trillion, four hundred twenty-three billion, four hundred fifty-four million, four hundred twenty-one thousand, three".