16720233 has 8 divisors (see below), whose sum is σ = 22377600. Its totient is φ = 11104848.

The previous prime is 16720217. The next prime is 16720243. The reversal of 16720233 is 33202761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16720233 - 2⁴ = 16720217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16720243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9553 + ... + 11166.

It is an arithmetic number, because the mean of its divisors is an integer number (2797200).

Almost surely, 2^16720233 is an apocalyptic number.

It is an amenable number.

16720233 is a deficient number, since it is larger than the sum of its proper divisors (5657367).

16720233 is a wasteful number, since it uses less digits than its factorization.

16720233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20991.

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 16720233 is about 4089.0381509592. The cubic root of 16720233 is about 255.7098407219.

Adding to 16720233 its reverse (33202761), we get a palindrome (49922994).

The spelling of 16720233 in words is "sixteen million, seven hundred twenty thousand, two hundred thirty-three".