12420389859 has 4 divisors (see below), whose sum is σ = 16560519816. Its totient is φ = 8280259904.

The previous prime is 12420389831. The next prime is 12420389869. The reversal of 12420389859 is 95898302421.

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 12420389859 - 2⁸ = 12420389603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12420389869) 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, 2070064974 + ... + 2070064979.

It is an arithmetic number, because the mean of its divisors is an integer number (4140129954).

Almost surely, 2^12420389859 is an apocalyptic number.

12420389859 is a deficient number, since it is larger than the sum of its proper divisors (4140129957).

12420389859 is an equidigital number, since it uses as much as digits as its factorization.

12420389859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4140129956.

The product of its (nonzero) digits is 1244160, while the sum is 51.

The spelling of 12420389859 in words is "twelve billion, four hundred twenty million, three hundred eighty-nine thousand, eight hundred fifty-nine".