21463932904 has 8 divisors (see below), whose sum is σ = 40244874210. Its totient is φ = 10731966448.

The previous prime is 21463932899. The next prime is 21463932929. The reversal of 21463932904 is 40923936412.

It can be written as a sum of positive squares in only one way, i.e., 18878210404 + 2585722500 = 137398^2 + 50850^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1341495799 + ... + 1341495814.

Almost surely, 2^21463932904 is an apocalyptic number.

It is an amenable number.

21463932904 is a deficient number, since it is larger than the sum of its proper divisors (18780941306).

21463932904 is a wasteful number, since it uses less digits than its factorization.

21463932904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2682991619 (or 2682991615 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 21463932904 in words is "twenty-one billion, four hundred sixty-three million, nine hundred thirty-two thousand, nine hundred four".