16420347 has 8 divisors (see below), whose sum is σ = 24326480. Its totient is φ = 10946880.

The previous prime is 16420333. The next prime is 16420373. The reversal of 16420347 is 74302461.

It is not a de Polignac number, because 16420347 - 2⁴ = 16420331 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 608161 = 16420347 / (1 + 6 + 4 + 2 + 0 + 3 + 4 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16420347.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16420447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304054 + ... + 304107.

It is an arithmetic number, because the mean of its divisors is an integer number (3040810).

Almost surely, 2^16420347 is an apocalyptic number.

16420347 is a deficient number, since it is larger than the sum of its proper divisors (7906133).

16420347 is an equidigital number, since it uses as much as digits as its factorization.

16420347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608170 (or 608164 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 16420347 is about 4052.2027343162. The cubic root of 16420347 is about 254.1718462201.

The spelling of 16420347 in words is "sixteen million, four hundred twenty thousand, three hundred forty-seven".