16820670 has 16 divisors (see below), whose sum is σ = 40369680. Its totient is φ = 4485504.

The previous prime is 16820653. The next prime is 16820677. The reversal of 16820670 is 7602861.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 560689 = 16820670 / (1 + 6 + 8 + 2 + 0 + 6 + 7 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16820677) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 280315 + ... + 280374.

It is an arithmetic number, because the mean of its divisors is an integer number (2523105).

Almost surely, 2^16820670 is an apocalyptic number.

16820670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16820670 is an abundant number, since it is smaller than the sum of its proper divisors (23549010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16820670 is a wasteful number, since it uses less digits than its factorization.

16820670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560699.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 16820670 is about 4101.3010130933. The cubic root of 16820670 is about 256.2208279304.

The spelling of 16820670 in words is "sixteen million, eight hundred twenty thousand, six hundred seventy".