21876263971 has 2 divisors, whose sum is σ = 21876263972. Its totient is φ = 21876263970.

The previous prime is 21876263957. The next prime is 21876263987. The reversal of 21876263971 is 17936267812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21876263971 - 2¹¹ = 21876261923 is a prime.

It is not a weakly prime, because it can be changed into another prime (21876263371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10938131985 + 10938131986.

It is an arithmetic number, because the mean of its divisors is an integer number (10938131986).

Almost surely, 2^21876263971 is an apocalyptic number.

21876263971 is a deficient number, since it is larger than the sum of its proper divisors (1).

21876263971 is an equidigital number, since it uses as much as digits as its factorization.

21876263971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 52.

The spelling of 21876263971 in words is "twenty-one billion, eight hundred seventy-six million, two hundred sixty-three thousand, nine hundred seventy-one".