21336716652 has 24 divisors (see below), whose sum is σ = 49813213632. Its totient is φ = 7108304400.

The previous prime is 21336716617. The next prime is 21336716671. The reversal of 21336716652 is 25661763312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469174 + ... + 512637.

It is an arithmetic number, because the mean of its divisors is an integer number (2075550568).

Almost surely, 2^21336716652 is an apocalyptic number.

It is an amenable number.

21336716652 is an abundant number, since it is smaller than the sum of its proper divisors (28476496980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21336716652 is a wasteful number, since it uses less digits than its factorization.

21336716652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983629 (or 983627 counting only the distinct ones).

The product of its digits is 272160, while the sum is 42.

The spelling of 21336716652 in words is "twenty-one billion, three hundred thirty-six million, seven hundred sixteen thousand, six hundred fifty-two".