21404275775 has 12 divisors (see below), whose sum is σ = 27456520200. Its totient is φ = 16532957280.

The previous prime is 21404275723. The next prime is 21404275793. The reversal of 21404275775 is 57757240412.

It is not a de Polignac number, because 21404275775 - 2²⁰ = 21403227199 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14760845 + ... + 14762294.

It is an arithmetic number, because the mean of its divisors is an integer number (2288043350).

Almost surely, 2^21404275775 is an apocalyptic number.

21404275775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21404275775 is a deficient number, since it is larger than the sum of its proper divisors (6052244425).

21404275775 is a wasteful number, since it uses less digits than its factorization.

21404275775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29523178 (or 29523173 counting only the distinct ones).

The product of its (nonzero) digits is 548800, while the sum is 44.

The spelling of 21404275775 in words is "twenty-one billion, four hundred four million, two hundred seventy-five thousand, seven hundred seventy-five".