16820070 has 16 divisors (see below), whose sum is σ = 40368240. Its totient is φ = 4485344.

The previous prime is 16820053. The next prime is 16820071. The reversal of 16820070 is 7002861.

It is a self number, because there is not a number n which added to its sum of digits gives 16820070.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16820071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280305 + ... + 280364.

It is an arithmetic number, because the mean of its divisors is an integer number (2523015).

Almost surely, 2^16820070 is an apocalyptic number.

16820070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16820070 is an abundant number, since it is smaller than the sum of its proper divisors (23548170).

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

16820070 is a wasteful number, since it uses less digits than its factorization.

16820070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560679.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 16820070 is about 4101.2278649205. The cubic root of 16820070 is about 256.2177813945.

The spelling of 16820070 in words is "sixteen million, eight hundred twenty thousand, seventy".