20211200993 has 2 divisors, whose sum is σ = 20211200994. Its totient is φ = 20211200992.

The previous prime is 20211200983. The next prime is 20211201019. The reversal of 20211200993 is 39900211202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10880993344 + 9330207649 = 104312^2 + 96593^2 .

It is a cyclic number.

It is not a de Polignac number, because 20211200993 - 2²² = 20207006689 is a prime.

It is not a weakly prime, because it can be changed into another prime (20211200903) 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, 10105600496 + 10105600497.

It is an arithmetic number, because the mean of its divisors is an integer number (10105600497).

Almost surely, 2^20211200993 is an apocalyptic number.

It is an amenable number.

20211200993 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211200993 is an equidigital number, since it uses as much as digits as its factorization.

20211200993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 20211200993 in words is "twenty billion, two hundred eleven million, two hundred thousand, nine hundred ninety-three".