21193456148 has 12 divisors (see below), whose sum is σ = 37371667872. Its totient is φ = 10515836760.

The previous prime is 21193456133. The next prime is 21193456217. The reversal of 21193456148 is 84165439112.

It is a junction number, because it is equal to n+sod(n) for n = 21193456099 and 21193456108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20222240 + ... + 20223287.

It is an arithmetic number, because the mean of its divisors is an integer number (3114305656).

Almost surely, 2^21193456148 is an apocalyptic number.

It is an amenable number.

21193456148 is a deficient number, since it is larger than the sum of its proper divisors (16178211724).

21193456148 is a wasteful number, since it uses less digits than its factorization.

21193456148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40445662 (or 40445660 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The spelling of 21193456148 in words is "twenty-one billion, one hundred ninety-three million, four hundred fifty-six thousand, one hundred forty-eight".