16894813 has 4 divisors (see below), whose sum is σ = 18194428. Its totient is φ = 15595200.

The previous prime is 16894793. The next prime is 16894841. The reversal of 16894813 is 31849861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11682724 + 5212089 = 3418^2 + 2283^2 .

It is a cyclic number.

It is not a de Polignac number, because 16894813 - 2⁹ = 16894301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16894853) 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, 649788 + ... + 649813.

It is an arithmetic number, because the mean of its divisors is an integer number (4548607).

Almost surely, 2^16894813 is an apocalyptic number.

16894813 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16894813 is a deficient number, since it is larger than the sum of its proper divisors (1299615).

16894813 is a wasteful number, since it uses less digits than its factorization.

16894813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299614.

The product of its digits is 41472, while the sum is 40.

The square root of 16894813 is about 4110.3300354108. The cubic root of 16894813 is about 256.5967371945.

It can be divided in two parts, 168948 and 13, that multiplied together give a square (2196324 = 1482²).

The spelling of 16894813 in words is "sixteen million, eight hundred ninety-four thousand, eight hundred thirteen".