16681832 has 8 divisors (see below), whose sum is σ = 31278450. Its totient is φ = 8340912.

The previous prime is 16681823. The next prime is 16681843. The reversal of 16681832 is 23818661.

It can be written as a sum of positive squares in only one way, i.e., 15570916 + 1110916 = 3946^2 + 1054^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 16681792 and 16681801.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1042607 + ... + 1042622.

Almost surely, 2^16681832 is an apocalyptic number.

It is an amenable number.

16681832 is a deficient number, since it is larger than the sum of its proper divisors (14596618).

16681832 is a wasteful number, since it uses less digits than its factorization.

16681832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085235 (or 2085231 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 16681832 is about 4084.3398487393. The cubic root of 16681832 is about 255.5139295641.

The spelling of 16681832 in words is "sixteen million, six hundred eighty-one thousand, eight hundred thirty-two".