21698293368 has 16 divisors (see below), whose sum is σ = 54245733480. Its totient is φ = 7232764448.

The previous prime is 21698293367. The next prime is 21698293387. The reversal of 21698293368 is 86339289612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21698293363) 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 3 ways as a sum of consecutive naturals, for example, 452047755 + ... + 452047802.

Almost surely, 2^21698293368 is an apocalyptic number.

It is an amenable number.

21698293368 is an abundant number, since it is smaller than the sum of its proper divisors (32547440112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21698293368 is a wasteful number, since it uses less digits than its factorization.

21698293368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904095566 (or 904095562 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 57.

The spelling of 21698293368 in words is "twenty-one billion, six hundred ninety-eight million, two hundred ninety-three thousand, three hundred sixty-eight".