21488027536 has 10 divisors (see below), whose sum is σ = 41633053382. Its totient is φ = 10744013760.

The previous prime is 21488027531. The next prime is 21488027551. The reversal of 21488027536 is 63572088412.

It can be written as a sum of positive squares in only one way, i.e., 18840307600 + 2647719936 = 137260^2 + 51456^2 .

It is not an unprimeable number, because it can be changed into a prime (21488027531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671500845 + ... + 671500876.

Almost surely, 2^21488027536 is an apocalyptic number.

It is an amenable number.

21488027536 is a deficient number, since it is larger than the sum of its proper divisors (20145025846).

21488027536 is a wasteful number, since it uses less digits than its factorization.

21488027536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343001729 (or 1343001723 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 21488027536 in words is "twenty-one billion, four hundred eighty-eight million, twenty-seven thousand, five hundred thirty-six".