20633951983 has 2 divisors, whose sum is σ = 20633951984. Its totient is φ = 20633951982.

The previous prime is 20633951971. The next prime is 20633952019. The reversal of 20633951983 is 38915933602.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20633951983 - 2²⁵ = 20600397551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20633951903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10316975991 + 10316975992.

It is an arithmetic number, because the mean of its divisors is an integer number (10316975992).

Almost surely, 2^20633951983 is an apocalyptic number.

20633951983 is a deficient number, since it is larger than the sum of its proper divisors (1).

20633951983 is an equidigital number, since it uses as much as digits as its factorization.

20633951983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The spelling of 20633951983 in words is "twenty billion, six hundred thirty-three million, nine hundred fifty-one thousand, nine hundred eighty-three".