12090721782 has 32 divisors (see below), whose sum is σ = 25523596800. Its totient is φ = 3807705888.

The previous prime is 12090721781. The next prime is 12090721787. The reversal of 12090721782 is 28712709021.

It is a self number, because there is not a number n which added to its sum of digits gives 12090721782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12090721781) 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, 102657 + ... + 186332.

It is an arithmetic number, because the mean of its divisors is an integer number (797612400).

Almost surely, 2^12090721782 is an apocalyptic number.

12090721782 is an abundant number, since it is smaller than the sum of its proper divisors (13432875018).

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

12090721782 is a wasteful number, since it uses less digits than its factorization.

12090721782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289380.

The product of its (nonzero) digits is 28224, while the sum is 39.

The spelling of 12090721782 in words is "twelve billion, ninety million, seven hundred twenty-one thousand, seven hundred eighty-two".