21073436983 has 2 divisors, whose sum is σ = 21073436984. Its totient is φ = 21073436982.

The previous prime is 21073436957. The next prime is 21073437071. The reversal of 21073436983 is 38963437012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21073436983 - 2⁹ = 21073436471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21073406983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10536718491 + 10536718492.

It is an arithmetic number, because the mean of its divisors is an integer number (10536718492).

Almost surely, 2^21073436983 is an apocalyptic number.

21073436983 is a deficient number, since it is larger than the sum of its proper divisors (1).

21073436983 is an equidigital number, since it uses as much as digits as its factorization.

21073436983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 46.

The spelling of 21073436983 in words is "twenty-one billion, seventy-three million, four hundred thirty-six thousand, nine hundred eighty-three".