21466117425 has 12 divisors (see below), whose sum is σ = 35490647600. Its totient is φ = 11448595920.

The previous prime is 21466117391. The next prime is 21466117451. The reversal of 21466117425 is 52471166412.

It is not a de Polignac number, because 21466117425 - 2¹⁰ = 21466116401 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143107375 + ... + 143107524.

Almost surely, 2^21466117425 is an apocalyptic number.

21466117425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21466117425 is a deficient number, since it is larger than the sum of its proper divisors (14024530175).

21466117425 is a wasteful number, since it uses less digits than its factorization.

21466117425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286214912 (or 286214907 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The spelling of 21466117425 in words is "twenty-one billion, four hundred sixty-six million, one hundred seventeen thousand, four hundred twenty-five".