16620233 has 4 divisors (see below), whose sum is σ = 18994560. Its totient is φ = 14245908.

The previous prime is 16620229. The next prime is 16620239. The reversal of 16620233 is 33202661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33202661 = 41 ⋅809821.

It is a cyclic number.

It is not a de Polignac number, because 16620233 - 2² = 16620229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16620199 and 16620208.

It is not an unprimeable number, because it can be changed into a prime (16620239) 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, 1187153 + ... + 1187166.

It is an arithmetic number, because the mean of its divisors is an integer number (4748640).

Almost surely, 2^16620233 is an apocalyptic number.

It is an amenable number.

16620233 is a deficient number, since it is larger than the sum of its proper divisors (2374327).

16620233 is an equidigital number, since it uses as much as digits as its factorization.

16620233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2374326.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 16620233 is about 4076.7919986185. The cubic root of 16620233 is about 255.1990397808.

Adding to 16620233 its reverse (33202661), we get a palindrome (49822894).

The spelling of 16620233 in words is "sixteen million, six hundred twenty thousand, two hundred thirty-three".