21340008512 has 14 divisors (see below), whose sum is σ = 42346579518. Its totient is φ = 10670004224.

The previous prime is 21340008509. The next prime is 21340008539. The reversal of 21340008512 is 21580004312.

It can be written as a sum of positive squares in only one way, i.e., 11230912576 + 10109095936 = 105976^2 + 100544^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166718753 + ... + 166718880.

Almost surely, 2^21340008512 is an apocalyptic number.

It is an amenable number.

21340008512 is a deficient number, since it is larger than the sum of its proper divisors (21006571006).

21340008512 is an equidigital number, since it uses as much as digits as its factorization.

21340008512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333437645 (or 333437635 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The spelling of 21340008512 in words is "twenty-one billion, three hundred forty million, eight thousand, five hundred twelve".