21861096463 has 2 divisors, whose sum is σ = 21861096464. Its totient is φ = 21861096462.

The previous prime is 21861096427. The next prime is 21861096479. The reversal of 21861096463 is 36469016812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21861096463 - 2⁹ = 21861095951 is a prime.

It is a super-2 number, since 2×21861096463² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21861096493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10930548231 + 10930548232.

It is an arithmetic number, because the mean of its divisors is an integer number (10930548232).

Almost surely, 2^21861096463 is an apocalyptic number.

21861096463 is a deficient number, since it is larger than the sum of its proper divisors (1).

21861096463 is an equidigital number, since it uses as much as digits as its factorization.

21861096463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 21861096463 in words is "twenty-one billion, eight hundred sixty-one million, ninety-six thousand, four hundred sixty-three".