20886464 has 14 divisors (see below), whose sum is σ = 41446704. Its totient is φ = 10443200.

The previous prime is 20886457. The next prime is 20886469. The reversal of 20886464 is 46468802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20886469) 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, 163112 + ... + 163239.

Almost surely, 2^20886464 is an apocalyptic number.

It is an amenable number.

20886464 is a deficient number, since it is larger than the sum of its proper divisors (20560240).

20886464 is an equidigital number, since it uses as much as digits as its factorization.

20886464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326363 (or 326353 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 20886464 is about 4570.1711127703. The cubic root of 20886464 is about 275.3943169712.

The spelling of 20886464 in words is "twenty million, eight hundred eighty-six thousand, four hundred sixty-four".