12014205978 has 16 divisors (see below), whose sum is σ = 24187542336. Its totient is φ = 3978213600.

The previous prime is 12014205971. The next prime is 12014206013. The reversal of 12014205978 is 87950241021.

It is a super-2 number, since 2×12014205978² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12014205971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6629451 + ... + 6631262.

It is an arithmetic number, because the mean of its divisors is an integer number (1511721396).

Almost surely, 2^12014205978 is an apocalyptic number.

12014205978 is an abundant number, since it is smaller than the sum of its proper divisors (12173336358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12014205978 is a wasteful number, since it uses less digits than its factorization.

12014205978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13260869.

The product of its (nonzero) digits is 40320, while the sum is 39.

Adding to 12014205978 its reverse (87950241021), we get a palindrome (99964446999).

The spelling of 12014205978 in words is "twelve billion, fourteen million, two hundred five thousand, nine hundred seventy-eight".