21712300508 has 12 divisors (see below), whose sum is σ = 38004727992. Its totient is φ = 10853806800.

The previous prime is 21712300507. The next prime is 21712300517. The reversal of 21712300508 is 80500321712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21712300507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564935 + ... + 602142.

It is an arithmetic number, because the mean of its divisors is an integer number (3167060666).

Almost surely, 2^21712300508 is an apocalyptic number.

It is an amenable number.

21712300508 is a deficient number, since it is larger than the sum of its proper divisors (16292427484).

21712300508 is a wasteful number, since it uses less digits than its factorization.

21712300508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171732 (or 1171730 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The spelling of 21712300508 in words is "twenty-one billion, seven hundred twelve million, three hundred thousand, five hundred eight".