21413513512 has 8 divisors (see below), whose sum is σ = 40150337850. Its totient is φ = 10706756752.

The previous prime is 21413513503. The next prime is 21413513573. The reversal of 21413513512 is 21531531412.

It can be written as a sum of positive squares in only one way, i.e., 14755932676 + 6657580836 = 121474^2 + 81594^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1338344587 + ... + 1338344602.

Almost surely, 2^21413513512 is an apocalyptic number.

It is an amenable number.

21413513512 is a deficient number, since it is larger than the sum of its proper divisors (18736824338).

21413513512 is a wasteful number, since it uses less digits than its factorization.

21413513512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676689195 (or 2676689191 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The spelling of 21413513512 in words is "twenty-one billion, four hundred thirteen million, five hundred thirteen thousand, five hundred twelve".