21845686471 has 8 divisors (see below), whose sum is σ = 24967576224. Its totient is φ = 18724066080.

The previous prime is 21845686459. The next prime is 21845686529. The reversal of 21845686471 is 17468654812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21845686471 - 2³³ = 13255751879 is a prime.

It is a super-3 number, since 3×21845686471³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21845686771) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 155721 + ... + 260653.

It is an arithmetic number, because the mean of its divisors is an integer number (3120947028).

Almost surely, 2^21845686471 is an apocalyptic number.

21845686471 is a deficient number, since it is larger than the sum of its proper divisors (3121889753).

21845686471 is a wasteful number, since it uses less digits than its factorization.

21845686471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134681.

The product of its digits is 2580480, while the sum is 52.

The spelling of 21845686471 in words is "twenty-one billion, eight hundred forty-five million, six hundred eighty-six thousand, four hundred seventy-one".