21990314648 has 16 divisors (see below), whose sum is σ = 42653628000. Its totient is φ = 10616013856.

The previous prime is 21990314629. The next prime is 21990314653. The reversal of 21990314648 is 84641309912.

It is a congruent number.

It is an unprimeable number.

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, 47392688 + ... + 47393151.

It is an arithmetic number, because the mean of its divisors is an integer number (2665851750).

Almost surely, 2^21990314648 is an apocalyptic number.

It is an amenable number.

21990314648 is a deficient number, since it is larger than the sum of its proper divisors (20663313352).

21990314648 is a wasteful number, since it uses less digits than its factorization.

21990314648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94785874 (or 94785870 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 21990314648 in words is "twenty-one billion, nine hundred ninety million, three hundred fourteen thousand, six hundred forty-eight".