21768376675 has 6 divisors (see below), whose sum is σ = 26992787108. Its totient is φ = 17414701320.

The previous prime is 21768376583. The next prime is 21768376709. The reversal of 21768376675 is 57667386712.

It is not a de Polignac number, because 21768376675 - 2⁹ = 21768376163 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 5 ways as a sum of consecutive naturals, for example, 435367509 + ... + 435367558.

Almost surely, 2^21768376675 is an apocalyptic number.

21768376675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21768376675 is a deficient number, since it is larger than the sum of its proper divisors (5224410433).

21768376675 is an equidigital number, since it uses as much as digits as its factorization.

21768376675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870735077 (or 870735072 counting only the distinct ones).

The product of its digits is 17781120, while the sum is 58.

The spelling of 21768376675 in words is "twenty-one billion, seven hundred sixty-eight million, three hundred seventy-six thousand, six hundred seventy-five".