16748381 has 4 divisors (see below), whose sum is σ = 18036732. Its totient is φ = 15460032.

The previous prime is 16748359. The next prime is 16748411. The reversal of 16748381 is 18384761.

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 2805625 + 13942756 = 1675^2 + 3734^2 .

It is a cyclic number.

It is not a de Polignac number, because 16748381 - 2¹⁴ = 16731997 is a prime.

It is a super-2 number, since 2×16748381² = 561016532242322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16748681) 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, 644156 + ... + 644181.

It is an arithmetic number, because the mean of its divisors is an integer number (4509183).

Almost surely, 2^16748381 is an apocalyptic number.

It is an amenable number.

16748381 is a deficient number, since it is larger than the sum of its proper divisors (1288351).

16748381 is a wasteful number, since it uses less digits than its factorization.

16748381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288350.

The product of its digits is 32256, while the sum is 38.

The square root of 16748381 is about 4092.4785888261. The cubic root of 16748381 is about 255.8532535026.

The spelling of 16748381 in words is "sixteen million, seven hundred forty-eight thousand, three hundred eighty-one".