21316076 has 6 divisors (see below), whose sum is σ = 37303140. Its totient is φ = 10658036.

The previous prime is 21316063. The next prime is 21316091. The reversal of 21316076 is 67061312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2664506 + ... + 2664513.

It is an arithmetic number, because the mean of its divisors is an integer number (6217190).

Almost surely, 2^21316076 is an apocalyptic number.

It is an amenable number.

21316076 is a deficient number, since it is larger than the sum of its proper divisors (15987064).

21316076 is a wasteful number, since it uses less digits than its factorization.

21316076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5329023 (or 5329021 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 21316076 is about 4616.9336144242. The cubic root of 21316076 is about 277.2697047743.

Adding to 21316076 its reverse (67061312), we get a palindrome (88377388).

The spelling of 21316076 in words is "twenty-one million, three hundred sixteen thousand, seventy-six".