21330652144 has 20 divisors (see below), whose sum is σ = 42445116424. Its totient is φ = 10377073728.

The previous prime is 21330652139. The next prime is 21330652153. The reversal of 21330652144 is 44125603312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18015162 + ... + 18016345.

Almost surely, 2^21330652144 is an apocalyptic number.

It is an amenable number.

21330652144 is a deficient number, since it is larger than the sum of its proper divisors (21114464280).

21330652144 is a wasteful number, since it uses less digits than its factorization.

21330652144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36031552 (or 36031546 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 21330652144 in words is "twenty-one billion, three hundred thirty million, six hundred fifty-two thousand, one hundred forty-four".