21550300434587 has 2 divisors, whose sum is σ = 21550300434588. Its totient is φ = 21550300434586.

The previous prime is 21550300434577. The next prime is 21550300434623. The reversal of 21550300434587 is 78543400305512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21550300434587 - 2²⁸ = 21550031999131 is a prime.

It is not a weakly prime, because it can be changed into another prime (21550300434577) 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, 10775150217293 + 10775150217294.

It is an arithmetic number, because the mean of its divisors is an integer number (10775150217294).

Almost surely, 2^{21550300434587} is an apocalyptic number.

21550300434587 is a deficient number, since it is larger than the sum of its proper divisors (1).

21550300434587 is an equidigital number, since it uses as much as digits as its factorization.

21550300434587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016000, while the sum is 47.

The spelling of 21550300434587 in words is "twenty-one trillion, five hundred fifty billion, three hundred million, four hundred thirty-four thousand, five hundred eighty-seven".