12006042780 has 48 divisors (see below), whose sum is σ = 35078529024. Its totient is φ = 3062410560.

The previous prime is 12006042761. The next prime is 12006042781. The reversal of 12006042780 is 8724060021.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12006042781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4348636 + ... + 4351395.

It is an arithmetic number, because the mean of its divisors is an integer number (730802688).

Almost surely, 2^12006042780 is an apocalyptic number.

12006042780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12006042780 is an abundant number, since it is smaller than the sum of its proper divisors (23072486244).

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

12006042780 is a wasteful number, since it uses less digits than its factorization.

12006042780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8700066 (or 8700064 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The spelling of 12006042780 in words is "twelve billion, six million, forty-two thousand, seven hundred eighty".