21563466412 has 6 divisors (see below), whose sum is σ = 37736066228. Its totient is φ = 10781733204.

The previous prime is 21563466343. The next prime is 21563466439. The reversal of 21563466412 is 21466436512.

It is a super-3 number, since 3×21563466412³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2695433298 + ... + 2695433305.

Almost surely, 2^21563466412 is an apocalyptic number.

It is an amenable number.

21563466412 is a deficient number, since it is larger than the sum of its proper divisors (16172599816).

21563466412 is a wasteful number, since it uses less digits than its factorization.

21563466412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5390866607 (or 5390866605 counting only the distinct ones).

The product of its digits is 207360, while the sum is 40.

The spelling of 21563466412 in words is "twenty-one billion, five hundred sixty-three million, four hundred sixty-six thousand, four hundred twelve".