21033948967 has 2 divisors, whose sum is σ = 21033948968. Its totient is φ = 21033948966.

The previous prime is 21033948961. The next prime is 21033949009. The reversal of 21033948967 is 76984933012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21033948967 - 2²³ = 21025560359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21033948961) 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, 10516974483 + 10516974484.

It is an arithmetic number, because the mean of its divisors is an integer number (10516974484).

Almost surely, 2^21033948967 is an apocalyptic number.

21033948967 is a deficient number, since it is larger than the sum of its proper divisors (1).

21033948967 is an equidigital number, since it uses as much as digits as its factorization.

21033948967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 21033948967 in words is "twenty-one billion, thirty-three million, nine hundred forty-eight thousand, nine hundred sixty-seven".