12021763642 has 16 divisors (see below), whose sum is σ = 20701158912. Its totient is φ = 5129079120.

The previous prime is 12021763609. The next prime is 12021763643. The reversal of 12021763642 is 24636712021.

12021763642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12021763642² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12021763598 and 12021763607.

It is not an unprimeable number, because it can be changed into a prime (12021763643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1922209 + ... + 1928452.

It is an arithmetic number, because the mean of its divisors is an integer number (1293822432).

Almost surely, 2^12021763642 is an apocalyptic number.

12021763642 is a deficient number, since it is larger than the sum of its proper divisors (8679395270).

12021763642 is a wasteful number, since it uses less digits than its factorization.

12021763642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3850893.

The product of its (nonzero) digits is 24192, while the sum is 34.

The spelling of 12021763642 in words is "twelve billion, twenty-one million, seven hundred sixty-three thousand, six hundred forty-two".