16420330 has 8 divisors (see below), whose sum is σ = 29556612. Its totient is φ = 6568128.

The previous prime is 16420319. The next prime is 16420331. The reversal of 16420330 is 3302461.

It can be written as a sum of positive squares in 2 ways, for example, as 16232841 + 187489 = 4029^2 + 433^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 16420298 and 16420307.

It is not an unprimeable number, because it can be changed into a prime (16420331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821007 + ... + 821026.

Almost surely, 2^16420330 is an apocalyptic number.

16420330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16420330 is a deficient number, since it is larger than the sum of its proper divisors (13136282).

16420330 is a wasteful number, since it uses less digits than its factorization.

16420330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642040.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 16420330 is about 4052.2006366911. The cubic root of 16420330 is about 254.1717585053.

Adding to 16420330 its reverse (3302461), we get a palindrome (19722791).

The spelling of 16420330 in words is "sixteen million, four hundred twenty thousand, three hundred thirty".