16622885 has 4 divisors (see below), whose sum is σ = 19947468. Its totient is φ = 13298304.

The previous prime is 16622863. The next prime is 16622899. The reversal of 16622885 is 58822661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58822661 = 23 ⋅2557507.

It can be written as a sum of positive squares in 2 ways, for example, as 4190209 + 12432676 = 2047^2 + 3526^2 .

It is a cyclic number.

It is not a de Polignac number, because 16622885 - 2¹⁸ = 16360741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662284 + ... + 1662293.

It is an arithmetic number, because the mean of its divisors is an integer number (4986867).

Almost surely, 2^16622885 is an apocalyptic number.

It is an amenable number.

16622885 is a deficient number, since it is larger than the sum of its proper divisors (3324583).

16622885 is an equidigital number, since it uses as much as digits as its factorization.

16622885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3324582.

The product of its digits is 46080, while the sum is 38.

The square root of 16622885 is about 4077.1172413851. The cubic root of 16622885 is about 255.2126126322.

The spelling of 16622885 in words is "sixteen million, six hundred twenty-two thousand, eight hundred eighty-five".