21097607512 has 64 divisors (see below), whose sum is σ = 42690240000. Its totient is φ = 9738164736.

The previous prime is 21097607507. The next prime is 21097607521. The reversal of 21097607512 is 21570679012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3904989 + ... + 3910387.

It is an arithmetic number, because the mean of its divisors is an integer number (667035000).

Almost surely, 2^21097607512 is an apocalyptic number.

It is an amenable number.

21097607512 is an abundant number, since it is smaller than the sum of its proper divisors (21592632488).

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

21097607512 is a wasteful number, since it uses less digits than its factorization.

21097607512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5968 (or 5964 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 40.

The spelling of 21097607512 in words is "twenty-one billion, ninety-seven million, six hundred seven thousand, five hundred twelve".