20886616 has 8 divisors (see below), whose sum is σ = 39162420. Its totient is φ = 10443304.

The previous prime is 20886601. The next prime is 20886617. The reversal of 20886616 is 61668802.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20886617) by changing a digit.

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, 1305406 + ... + 1305421.

Almost surely, 2^20886616 is an apocalyptic number.

It is an amenable number.

20886616 is a deficient number, since it is larger than the sum of its proper divisors (18275804).

20886616 is a wasteful number, since it uses less digits than its factorization.

20886616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2610833 (or 2610829 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 20886616 is about 4570.1877423143. The cubic root of 20886616 is about 275.3949850248.

The spelling of 20886616 in words is "twenty million, eight hundred eighty-six thousand, six hundred sixteen".