20846636 has 6 divisors (see below), whose sum is σ = 36481620. Its totient is φ = 10423316.

The previous prime is 20846627. The next prime is 20846653. The reversal of 20846636 is 63664802.

It is a junction number, because it is equal to n+sod(n) for n = 20846596 and 20846605.

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, 2605826 + ... + 2605833.

It is an arithmetic number, because the mean of its divisors is an integer number (6080270).

Almost surely, 2^20846636 is an apocalyptic number.

It is an amenable number.

20846636 is a deficient number, since it is larger than the sum of its proper divisors (15634984).

20846636 is a wasteful number, since it uses less digits than its factorization.

20846636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5211663 (or 5211661 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 20846636 is about 4565.8116474511. The cubic root of 20846636 is about 275.2191575304.

The spelling of 20846636 in words is "twenty million, eight hundred forty-six thousand, six hundred thirty-six".