21845429671 has 8 divisors (see below), whose sum is σ = 23629488624. Its totient is φ = 20076176640.

The previous prime is 21845429657. The next prime is 21845429701. The reversal of 21845429671 is 17692454812.

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

It is not a de Polignac number, because 21845429671 - 2²⁷ = 21711211943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21845429651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3698410 + ... + 3704311.

It is an arithmetic number, because the mean of its divisors is an integer number (2953686078).

Almost surely, 2^21845429671 is an apocalyptic number.

21845429671 is a deficient number, since it is larger than the sum of its proper divisors (1784058953).

21845429671 is a wasteful number, since it uses less digits than its factorization.

21845429671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7402961.

The product of its digits is 967680, while the sum is 49.

The spelling of 21845429671 in words is "twenty-one billion, eight hundred forty-five million, four hundred twenty-nine thousand, six hundred seventy-one".