12420542343 has 16 divisors (see below), whose sum is σ = 18335892096. Its totient is φ = 7415247840.

The previous prime is 12420542291. The next prime is 12420542371. The reversal of 12420542343 is 34324502421.

It is not a de Polignac number, because 12420542343 - 2¹³ = 12420534151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12420542343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420540343) 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, 2806596 + ... + 2811017.

It is an arithmetic number, because the mean of its divisors is an integer number (1145993256).

Almost surely, 2^12420542343 is an apocalyptic number.

12420542343 is a deficient number, since it is larger than the sum of its proper divisors (5915349753).

12420542343 is a wasteful number, since it uses less digits than its factorization.

12420542343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5617694.

The product of its (nonzero) digits is 23040, while the sum is 30.

The spelling of 12420542343 in words is "twelve billion, four hundred twenty million, five hundred forty-two thousand, three hundred forty-three".