16427811 has 4 divisors (see below), whose sum is σ = 21903752. Its totient is φ = 10951872.

The previous prime is 16427809. The next prime is 16427843. The reversal of 16427811 is 11872461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11872461 = 3 ⋅3957487.

It is not a de Polignac number, because 16427811 - 2¹ = 16427809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16427881) 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, 2737966 + ... + 2737971.

It is an arithmetic number, because the mean of its divisors is an integer number (5475938).

Almost surely, 2^16427811 is an apocalyptic number.

16427811 is a deficient number, since it is larger than the sum of its proper divisors (5475941).

16427811 is an equidigital number, since it uses as much as digits as its factorization.

16427811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5475940.

The product of its digits is 2688, while the sum is 30.

The square root of 16427811 is about 4053.1236102542. The cubic root of 16427811 is about 254.2103523345.

It can be divided in two parts, 1642 and 7811, that added together give a triangular number (9453 = T₁₃₇).

The spelling of 16427811 in words is "sixteen million, four hundred twenty-seven thousand, eight hundred eleven".