21316604463 has 64 divisors (see below), whose sum is σ = 39401856000. Its totient is φ = 11065351680.

The previous prime is 21316604459. The next prime is 21316604467. The reversal of 21316604463 is 36440661312.

21316604463 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 6 + 604 + 46 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (21316604459) and next prime (21316604467).

It is not a de Polignac number, because 21316604463 - 2² = 21316604459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21316604467) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3641563 + ... + 3647411.

It is an arithmetic number, because the mean of its divisors is an integer number (615654000).

Almost surely, 2^21316604463 is an apocalyptic number.

21316604463 is a deficient number, since it is larger than the sum of its proper divisors (18085251537).

21316604463 is a wasteful number, since it uses less digits than its factorization.

21316604463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7629 (or 7623 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 21316604463 in words is "twenty-one billion, three hundred sixteen million, six hundred four thousand, four hundred sixty-three".