15120423423 has 24 divisors (see below), whose sum is σ = 25002432000. Its totient is φ = 8625795984.

The previous prime is 15120423403. The next prime is 15120423427. The reversal of 15120423423 is 32432402151.

15120423423 is a `hidden beast` number, since 15 + 1 + 204 + 23 + 423 = 666.

It is not a de Polignac number, because 15120423423 - 2⁶ = 15120423359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15120423427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162603 + ... + 238076.

It is an arithmetic number, because the mean of its divisors is an integer number (1041768000).

Almost surely, 2^15120423423 is an apocalyptic number.

15120423423 is a deficient number, since it is larger than the sum of its proper divisors (9882008577).

15120423423 is a wasteful number, since it uses less digits than its factorization.

15120423423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401291 (or 401288 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 15120423423 its reverse (32432402151), we get a palindrome (47552825574).

The spelling of 15120423423 in words is "fifteen billion, one hundred twenty million, four hundred twenty-three thousand, four hundred twenty-three".