16920239 has 6 divisors (see below), whose sum is σ = 19682784. Its totient is φ = 14503020.

The previous prime is 16920221. The next prime is 16920251. The reversal of 16920239 is 93202961.

It is not a de Polignac number, because 16920239 - 2¹² = 16916143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16920259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 172607 + ... + 172704.

It is an arithmetic number, because the mean of its divisors is an integer number (3280464).

Almost surely, 2^16920239 is an apocalyptic number.

16920239 is a deficient number, since it is larger than the sum of its proper divisors (2762545).

16920239 is an equidigital number, since it uses as much as digits as its factorization.

16920239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345325 (or 345318 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 16920239 is about 4113.4218115822. The cubic root of 16920239 is about 256.7253951929.

The spelling of 16920239 in words is "sixteen million, nine hundred twenty thousand, two hundred thirty-nine".