20866673983 has 2 divisors, whose sum is σ = 20866673984. Its totient is φ = 20866673982.

The previous prime is 20866673951. The next prime is 20866673999. The reversal of 20866673983 is 38937666802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20866673983 - 2⁵ = 20866673951 is a prime.

It is a super-2 number, since 2×20866673983² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20866673483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10433336991 + 10433336992.

It is an arithmetic number, because the mean of its divisors is an integer number (10433336992).

Almost surely, 2^20866673983 is an apocalyptic number.

20866673983 is a deficient number, since it is larger than the sum of its proper divisors (1).

20866673983 is an equidigital number, since it uses as much as digits as its factorization.

20866673983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15676416, while the sum is 58.

The spelling of 20866673983 in words is "twenty billion, eight hundred sixty-six million, six hundred seventy-three thousand, nine hundred eighty-three".