20356504211 has 2 divisors, whose sum is σ = 20356504212. Its totient is φ = 20356504210.

The previous prime is 20356504127. The next prime is 20356504219. The reversal of 20356504211 is 11240565302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20356504211 is a prime.

It is not a weakly prime, because it can be changed into another prime (20356504219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10178252105 + 10178252106.

It is an arithmetic number, because the mean of its divisors is an integer number (10178252106).

Almost surely, 2^20356504211 is an apocalyptic number.

20356504211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20356504211 is an equidigital number, since it uses as much as digits as its factorization.

20356504211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 29.

The spelling of 20356504211 in words is "twenty billion, three hundred fifty-six million, five hundred four thousand, two hundred eleven".