21340663052 has 6 divisors (see below), whose sum is σ = 37346160348. Its totient is φ = 10670331524.

The previous prime is 21340663039. The next prime is 21340663063. The reversal of 21340663052 is 25036604312.

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 as a sum of consecutive naturals, namely, 2667582878 + ... + 2667582885.

It is an arithmetic number, because the mean of its divisors is an integer number (6224360058).

Almost surely, 2^21340663052 is an apocalyptic number.

It is an amenable number.

21340663052 is a deficient number, since it is larger than the sum of its proper divisors (16005497296).

21340663052 is a wasteful number, since it uses less digits than its factorization.

21340663052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5335165767 (or 5335165765 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The spelling of 21340663052 in words is "twenty-one billion, three hundred forty million, six hundred sixty-three thousand, fifty-two".