21116492512 has 24 divisors (see below), whose sum is σ = 41588113392. Its totient is φ = 10554432000.

The previous prime is 21116492429. The next prime is 21116492561. The reversal of 21116492512 is 21529461112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28164 + ... + 207427.

It is an arithmetic number, because the mean of its divisors is an integer number (1732838058).

Almost surely, 2^21116492512 is an apocalyptic number.

It is an amenable number.

21116492512 is a deficient number, since it is larger than the sum of its proper divisors (20471620880).

21116492512 is a wasteful number, since it uses less digits than its factorization.

21116492512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238402 (or 238394 counting only the distinct ones).

The product of its digits is 8640, while the sum is 34.

The spelling of 21116492512 in words is "twenty-one billion, one hundred sixteen million, four hundred ninety-two thousand, five hundred twelve".