21620536527683 has 2 divisors, whose sum is σ = 21620536527684. Its totient is φ = 21620536527682.

The previous prime is 21620536527643. The next prime is 21620536527757. The reversal of 21620536527683 is 38672563502612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21620536527683 is a prime.

It is not a weakly prime, because it can be changed into another prime (21620536527643) 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 as a sum of consecutive naturals, namely, 10810268263841 + 10810268263842.

It is an arithmetic number, because the mean of its divisors is an integer number (10810268263842).

Almost surely, 2^{21620536527683} is an apocalyptic number.

21620536527683 is a deficient number, since it is larger than the sum of its proper divisors (1).

21620536527683 is an equidigital number, since it uses as much as digits as its factorization.

21620536527683 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21772800, while the sum is 56.

The spelling of 21620536527683 in words is "twenty-one trillion, six hundred twenty billion, five hundred thirty-six million, five hundred twenty-seven thousand, six hundred eighty-three".