20211994753 has 2 divisors, whose sum is σ = 20211994754. Its totient is φ = 20211994752.

The previous prime is 20211994711. The next prime is 20211994757. The reversal of 20211994753 is 35749911202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19152622449 + 1059372304 = 138393^2 + 32548^2 .

It is a cyclic number.

It is not a de Polignac number, because 20211994753 - 2⁹ = 20211994241 is a prime.

It is not a weakly prime, because it can be changed into another prime (20211994757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105997376 + 10105997377.

It is an arithmetic number, because the mean of its divisors is an integer number (10105997377).

Almost surely, 2^20211994753 is an apocalyptic number.

It is an amenable number.

20211994753 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211994753 is an equidigital number, since it uses as much as digits as its factorization.

20211994753 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The spelling of 20211994753 in words is "twenty billion, two hundred eleven million, nine hundred ninety-four thousand, seven hundred fifty-three".