21717124412 has 24 divisors (see below), whose sum is σ = 40030045440. Its totient is φ = 10280677680.

The previous prime is 21717124409. The next prime is 21717124417. The reversal of 21717124412 is 21442171712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21717124417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35837 + ... + 211467.

It is an arithmetic number, because the mean of its divisors is an integer number (1667918560).

Almost surely, 2^21717124412 is an apocalyptic number.

It is an amenable number.

21717124412 is a deficient number, since it is larger than the sum of its proper divisors (18312921028).

21717124412 is a wasteful number, since it uses less digits than its factorization.

21717124412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177281 (or 177279 counting only the distinct ones).

The product of its digits is 6272, while the sum is 32.

The spelling of 21717124412 in words is "twenty-one billion, seven hundred seventeen million, one hundred twenty-four thousand, four hundred twelve".