20854044611 has 2 divisors, whose sum is σ = 20854044612. Its totient is φ = 20854044610.

The previous prime is 20854044493. The next prime is 20854044649. The reversal of 20854044611 is 11644045802.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20854044611 is a prime.

It is not a weakly prime, because it can be changed into another prime (20854044661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10427022305 + 10427022306.

It is an arithmetic number, because the mean of its divisors is an integer number (10427022306).

Almost surely, 2^20854044611 is an apocalyptic number.

20854044611 is a deficient number, since it is larger than the sum of its proper divisors (1).

20854044611 is an equidigital number, since it uses as much as digits as its factorization.

20854044611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30720, while the sum is 35.

The spelling of 20854044611 in words is "twenty billion, eight hundred fifty-four million, forty-four thousand, six hundred eleven".