21802854967 has 2 divisors, whose sum is σ = 21802854968. Its totient is φ = 21802854966.

The previous prime is 21802854889. The next prime is 21802854971. The reversal of 21802854967 is 76945820812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21802854967 - 2¹¹ = 21802852919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21802854167) 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, 10901427483 + 10901427484.

It is an arithmetic number, because the mean of its divisors is an integer number (10901427484).

Almost surely, 2^21802854967 is an apocalyptic number.

21802854967 is a deficient number, since it is larger than the sum of its proper divisors (1).

21802854967 is an equidigital number, since it uses as much as digits as its factorization.

21802854967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 21802854967 in words is "twenty-one billion, eight hundred two million, eight hundred fifty-four thousand, nine hundred sixty-seven".