15830420123 has 4 divisors (see below), whose sum is σ = 18091908720. Its totient is φ = 13568931528.

The previous prime is 15830420117. The next prime is 15830420131. The reversal of 15830420123 is 32102403851.

It is a happy number.

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 15830420123 - 2⁴ = 15830420107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15830420143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1130744288 + ... + 1130744301.

It is an arithmetic number, because the mean of its divisors is an integer number (4522977180).

Almost surely, 2^15830420123 is an apocalyptic number.

15830420123 is a deficient number, since it is larger than the sum of its proper divisors (2261488597).

15830420123 is an equidigital number, since it uses as much as digits as its factorization.

15830420123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261488596.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 15830420123 its reverse (32102403851), we get a palindrome (47932823974).

The spelling of 15830420123 in words is "fifteen billion, eight hundred thirty million, four hundred twenty thousand, one hundred twenty-three".