16620243 has 8 divisors (see below), whose sum is σ = 22523856. Its totient is φ = 10898400.

The previous prime is 16620239. The next prime is 16620301. The reversal of 16620243 is 34202661.

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

It is not a de Polignac number, because 16620243 - 2² = 16620239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16620223) 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, 45228 + ... + 45593.

It is an arithmetic number, because the mean of its divisors is an integer number (2815482).

Almost surely, 2^16620243 is an apocalyptic number.

16620243 is a deficient number, since it is larger than the sum of its proper divisors (5903613).

16620243 is an equidigital number, since it uses as much as digits as its factorization.

16620243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90885.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 16620243 is about 4076.7932250729. The cubic root of 16620243 is about 255.1990909632.

The spelling of 16620243 in words is "sixteen million, six hundred twenty thousand, two hundred forty-three".