21180372083641 has 16 divisors (see below), whose sum is σ = 22483432411776. Its totient is φ = 19911689081856.

The previous prime is 21180372083627. The next prime is 21180372083671. The reversal of 21180372083641 is 14638027308112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21180372083641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21180372083591 and 21180372083600.

It is not an unprimeable number, because it can be changed into a prime (21180372083671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28375110 + ... + 29111983.

It is an arithmetic number, because the mean of its divisors is an integer number (1405214525736).

Almost surely, 2^{21180372083641} is an apocalyptic number.

It is an amenable number.

21180372083641 is a deficient number, since it is larger than the sum of its proper divisors (1303060328135).

21180372083641 is a wasteful number, since it uses less digits than its factorization.

21180372083641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57487392.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 21180372083641 in words is "twenty-one trillion, one hundred eighty billion, three hundred seventy-two million, eighty-three thousand, six hundred forty-one".