20841755971 has 2 divisors, whose sum is σ = 20841755972. Its totient is φ = 20841755970.

The previous prime is 20841755933. The next prime is 20841756007. The reversal of 20841755971 is 17955714802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20841755971 - 2⁷ = 20841755843 is a prime.

It is not a weakly prime, because it can be changed into another prime (20841755471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10420877985 + 10420877986.

It is an arithmetic number, because the mean of its divisors is an integer number (10420877986).

Almost surely, 2^20841755971 is an apocalyptic number.

20841755971 is a deficient number, since it is larger than the sum of its proper divisors (1).

20841755971 is an equidigital number, since it uses as much as digits as its factorization.

20841755971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 705600, while the sum is 49.

The spelling of 20841755971 in words is "twenty billion, eight hundred forty-one million, seven hundred fifty-five thousand, nine hundred seventy-one".