16816530 has 16 divisors (see below), whose sum is σ = 40359744. Its totient is φ = 4484400.

The previous prime is 16816517. The next prime is 16816559. The reversal of 16816530 is 3561861.

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: 560551 = 16816530 / (1 + 6 + 8 + 1 + 6 + 5 + 3 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280246 + ... + 280305.

It is an arithmetic number, because the mean of its divisors is an integer number (2522484).

Almost surely, 2^16816530 is an apocalyptic number.

16816530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16816530 is an abundant number, since it is smaller than the sum of its proper divisors (23543214).

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

16816530 is a wasteful number, since it uses less digits than its factorization.

16816530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560561.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 16816530 is about 4100.7962641419. The cubic root of 16816530 is about 256.1998053578.

The spelling of 16816530 in words is "sixteen million, eight hundred sixteen thousand, five hundred thirty".