21369648880807 has 2 divisors, whose sum is σ = 21369648880808. Its totient is φ = 21369648880806.

The previous prime is 21369648880777. The next prime is 21369648880847. The reversal of 21369648880807 is 70808884696312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21369648880807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21369648880847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10684824440403 + 10684824440404.

It is an arithmetic number, because the mean of its divisors is an integer number (10684824440404).

Almost surely, 2^{21369648880807} is an apocalyptic number.

21369648880807 is a deficient number, since it is larger than the sum of its proper divisors (1).

21369648880807 is an equidigital number, since it uses as much as digits as its factorization.

21369648880807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 222953472, while the sum is 70.

The spelling of 21369648880807 in words is "twenty-one trillion, three hundred sixty-nine billion, six hundred forty-eight million, eight hundred eighty thousand, eight hundred seven".