16420187 has 8 divisors (see below), whose sum is σ = 18809856. Its totient is φ = 14041512.

The previous prime is 16420171. The next prime is 16420189. The reversal of 16420187 is 78102461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16420187 - 2⁴ = 16420171 is a prime.

It is a super-2 number, since 2×16420187² = 539245082229938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16420189) 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, 758 + ... + 5780.

It is an arithmetic number, because the mean of its divisors is an integer number (2351232).

Almost surely, 2^16420187 is an apocalyptic number.

16420187 is a deficient number, since it is larger than the sum of its proper divisors (2389669).

16420187 is an equidigital number, since it uses as much as digits as its factorization.

16420187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5497.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 16420187 is about 4052.1829919193. The cubic root of 16420187 is about 254.1710206666.

The spelling of 16420187 in words is "sixteen million, four hundred twenty thousand, one hundred eighty-seven".