21910067875 has 16 divisors (see below), whose sum is σ = 27353858688. Its totient is φ = 17521584000.

The previous prime is 21910067867. The next prime is 21910067887. The reversal of 21910067875 is 57876001912.

It is a happy number.

It is not a de Polignac number, because 21910067875 - 2³ = 21910067867 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 323190 + ... + 385060.

It is an arithmetic number, because the mean of its divisors is an integer number (1709616168).

Almost surely, 2^21910067875 is an apocalyptic number.

21910067875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21910067875 is a deficient number, since it is larger than the sum of its proper divisors (5443790813).

21910067875 is an equidigital number, since it uses as much as digits as its factorization.

21910067875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64719 (or 64709 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 46.

The spelling of 21910067875 in words is "twenty-one billion, nine hundred ten million, sixty-seven thousand, eight hundred seventy-five".