16938851 has 4 divisors (see below), whose sum is σ = 17935272. Its totient is φ = 15942432.

The previous prime is 16938839. The next prime is 16938881. The reversal of 16938851 is 15883961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15883961 = 23 ⋅690607.

It is a cyclic number.

It is not a de Polignac number, because 16938851 - 2¹⁸ = 16676707 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16938799 and 16938808.

It is not an unprimeable number, because it can be changed into a prime (16938821) 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, 498185 + ... + 498218.

It is an arithmetic number, because the mean of its divisors is an integer number (4483818).

Almost surely, 2^16938851 is an apocalyptic number.

16938851 is a deficient number, since it is larger than the sum of its proper divisors (996421).

16938851 is an equidigital number, since it uses as much as digits as its factorization.

16938851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996420.

The product of its digits is 51840, while the sum is 41.

The square root of 16938851 is about 4115.6835398266. The cubic root of 16938851 is about 256.8194920149.

The spelling of 16938851 in words is "sixteen million, nine hundred thirty-eight thousand, eight hundred fifty-one".