16681434 has 32 divisors (see below), whose sum is σ = 41596416. Its totient is φ = 4332720.

The previous prime is 16681433. The next prime is 16681453. The reversal of 16681434 is 43418661.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 16681395 and 16681404.

It is not an unprimeable number, because it can be changed into a prime (16681433) 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, 17592 + ... + 18515.

It is an arithmetic number, because the mean of its divisors is an integer number (1299888).

Almost surely, 2^16681434 is an apocalyptic number.

16681434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16681434 is an abundant number, since it is smaller than the sum of its proper divisors (24914982).

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

16681434 is a wasteful number, since it uses less digits than its factorization.

16681434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36130.

The product of its digits is 13824, while the sum is 33.

The square root of 16681434 is about 4084.2911257647. The cubic root of 16681434 is about 255.5118975060.

The spelling of 16681434 in words is "sixteen million, six hundred eighty-one thousand, four hundred thirty-four".