16840453 has 8 divisors (see below), whose sum is σ = 19562240. Its totient is φ = 14197680.

The previous prime is 16840433. The next prime is 16840457. The reversal of 16840453 is 35404861.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-16840453 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 (16840457) 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, 19293 + ... + 20146.

It is an arithmetic number, because the mean of its divisors is an integer number (2445280).

Almost surely, 2^16840453 is an apocalyptic number.

It is an amenable number.

16840453 is a deficient number, since it is larger than the sum of its proper divisors (2721787).

16840453 is an equidigital number, since it uses as much as digits as its factorization.

16840453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39507.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 16840453 is about 4103.7121000382. The cubic root of 16840453 is about 256.3212367482.

The spelling of 16840453 in words is "sixteen million, eight hundred forty thousand, four hundred fifty-three".