12420034523 has 16 divisors (see below), whose sum is σ = 14087437056. Its totient is φ = 10863668640.

The previous prime is 12420034519. The next prime is 12420034531. The reversal of 12420034523 is 32543002421.

It is a cyclic number.

It is not a de Polignac number, because 12420034523 - 2² = 12420034519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12420034492 and 12420034501.

It is not an unprimeable number, because it can be changed into a prime (12420031523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162113 + ... + 226098.

It is an arithmetic number, because the mean of its divisors is an integer number (880464816).

Almost surely, 2^12420034523 is an apocalyptic number.

12420034523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12420034523 is a deficient number, since it is larger than the sum of its proper divisors (1667402533).

12420034523 is a wasteful number, since it uses less digits than its factorization.

12420034523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388354.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 12420034523 its reverse (32543002421), we get a palindrome (44963036944).

The spelling of 12420034523 in words is "twelve billion, four hundred twenty million, thirty-four thousand, five hundred twenty-three".