21776006324851 has 2 divisors, whose sum is σ = 21776006324852. Its totient is φ = 21776006324850.

The previous prime is 21776006324843. The next prime is 21776006324873. The reversal of 21776006324851 is 15842360067712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21776006324851 - 2³ = 21776006324843 is a prime.

It is not a weakly prime, because it can be changed into another prime (21776006324881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10888003162425 + 10888003162426.

It is an arithmetic number, because the mean of its divisors is an integer number (10888003162426).

Almost surely, 2^{21776006324851} is an apocalyptic number.

21776006324851 is a deficient number, since it is larger than the sum of its proper divisors (1).

21776006324851 is an equidigital number, since it uses as much as digits as its factorization.

21776006324851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 21776006324851 in words is "twenty-one trillion, seven hundred seventy-six billion, six million, three hundred twenty-four thousand, eight hundred fifty-one".