20664622 has 24 divisors (see below), whose sum is σ = 36082368. Its totient is φ = 8838720.

The previous prime is 20664601. The next prime is 20664641. The reversal of 20664622 is 22646602.

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 1603 + ... + 6625.

It is an arithmetic number, because the mean of its divisors is an integer number (1503432).

Almost surely, 2^20664622 is an apocalyptic number.

20664622 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20664622 is a deficient number, since it is larger than the sum of its proper divisors (15417746).

20664622 is a wasteful number, since it uses less digits than its factorization.

20664622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5064 (or 5053 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 20664622 is about 4545.8356767486. The cubic root of 20664622 is about 274.4158266052.

The spelling of 20664622 in words is "twenty million, six hundred sixty-four thousand, six hundred twenty-two".