21316634799 has 32 divisors (see below), whose sum is σ = 29326961664. Its totient is φ = 13764764160.

The previous prime is 21316634789. The next prime is 21316634809. The reversal of 21316634799 is 99743661312.

It is an interprime number because it is at equal distance from previous prime (21316634789) and next prime (21316634809).

It is not a de Polignac number, because 21316634799 - 2⁵ = 21316634767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21316634719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8144139 + ... + 8146755.

It is an arithmetic number, because the mean of its divisors is an integer number (916467552).

Almost surely, 2^21316634799 is an apocalyptic number.

21316634799 is a deficient number, since it is larger than the sum of its proper divisors (8010326865).

21316634799 is a wasteful number, since it uses less digits than its factorization.

21316634799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3167.

The product of its digits is 1469664, while the sum is 51.

The spelling of 21316634799 in words is "twenty-one billion, three hundred sixteen million, six hundred thirty-four thousand, seven hundred ninety-nine".