21747148888 has 16 divisors (see below), whose sum is σ = 40778745480. Its totient is φ = 10872816768.

The previous prime is 21747148879. The next prime is 21747148903. The reversal of 21747148888 is 88884174712.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38256 + ... + 212032.

Almost surely, 2^21747148888 is an apocalyptic number.

It is an amenable number.

21747148888 is a deficient number, since it is larger than the sum of its proper divisors (19031596592).

21747148888 is a wasteful number, since it uses less digits than its factorization.

21747148888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189426 (or 189422 counting only the distinct ones).

The product of its digits is 6422528, while the sum is 58.

The spelling of 21747148888 in words is "twenty-one billion, seven hundred forty-seven million, one hundred forty-eight thousand, eight hundred eighty-eight".