16381011 has 16 divisors (see below), whose sum is σ = 22225280. Its totient is φ = 10730880.

The previous prime is 16381007. The next prime is 16381033. The reversal of 16381011 is 11018361.

It is not a de Polignac number, because 16381011 - 2² = 16381007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16381061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67851 + ... + 68091.

It is an arithmetic number, because the mean of its divisors is an integer number (1389080).

Almost surely, 2^16381011 is an apocalyptic number.

16381011 is a deficient number, since it is larger than the sum of its proper divisors (5844269).

16381011 is a wasteful number, since it uses less digits than its factorization.

16381011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 16381011 is about 4047.3461675523. The cubic root of 16381011 is about 253.9687222527.

Adding to 16381011 its reverse (11018361), we get a palindrome (27399372).

The spelling of 16381011 in words is "sixteen million, three hundred eighty-one thousand, eleven".