16820656 has 10 divisors (see below), whose sum is σ = 32590052. Its totient is φ = 8410320.

The previous prime is 16820653. The next prime is 16820677. The reversal of 16820656 is 65602861.

It is not an unprimeable number, because it can be changed into a prime (16820651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525630 + ... + 525661.

Almost surely, 2^16820656 is an apocalyptic number.

16820656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16820656 is a deficient number, since it is larger than the sum of its proper divisors (15769396).

16820656 is a wasteful number, since it uses less digits than its factorization.

16820656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051299 (or 1051293 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 16820656 is about 4101.2993063175. The cubic root of 16820656 is about 256.2207568453.

The spelling of 16820656 in words is "sixteen million, eight hundred twenty thousand, six hundred fifty-six".