21806476348 has 12 divisors (see below), whose sum is σ = 38181358152. Its totient is φ = 10897516880.

The previous prime is 21806476313. The next prime is 21806476429. The reversal of 21806476348 is 84367460812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1421743 + ... + 1436998.

It is an arithmetic number, because the mean of its divisors is an integer number (3181779846).

Almost surely, 2^21806476348 is an apocalyptic number.

It is an amenable number.

21806476348 is a deficient number, since it is larger than the sum of its proper divisors (16374881804).

21806476348 is a wasteful number, since it uses less digits than its factorization.

21806476348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860652 (or 2860650 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 49.

The spelling of 21806476348 in words is "twenty-one billion, eight hundred six million, four hundred seventy-six thousand, three hundred forty-eight".