21333545087 has 2 divisors, whose sum is σ = 21333545088. Its totient is φ = 21333545086.

The previous prime is 21333545081. The next prime is 21333545131. The reversal of 21333545087 is 78054533312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21333545087 - 2¹⁶ = 21333479551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21333545081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666772543 + 10666772544.

It is an arithmetic number, because the mean of its divisors is an integer number (10666772544).

Almost surely, 2^21333545087 is an apocalyptic number.

21333545087 is a deficient number, since it is larger than the sum of its proper divisors (1).

21333545087 is an equidigital number, since it uses as much as digits as its factorization.

21333545087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 41.

The spelling of 21333545087 in words is "twenty-one billion, three hundred thirty-three million, five hundred forty-five thousand, eighty-seven".