21103083449 has 8 divisors (see below), whose sum is σ = 24118882368. Its totient is φ = 18087552720.

The previous prime is 21103083439. The next prime is 21103083541. The reversal of 21103083449 is 94438030112.

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 21103083449 - 2²⁴ = 21086306233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21103083439) 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, 147239 + ... + 252755.

It is an arithmetic number, because the mean of its divisors is an integer number (3014860296).

Almost surely, 2^21103083449 is an apocalyptic number.

It is an amenable number.

21103083449 is a deficient number, since it is larger than the sum of its proper divisors (3015798919).

21103083449 is a wasteful number, since it uses less digits than its factorization.

21103083449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134095.

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 21103083449 in words is "twenty-one billion, one hundred three million, eighty-three thousand, four hundred forty-nine".