16643474 has 8 divisors (see below), whose sum is σ = 24986880. Its totient is φ = 8314516.

The previous prime is 16643453. The next prime is 16643479. The reversal of 16643474 is 47434661.

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

It is not an unprimeable number, because it can be changed into a prime (16643479) 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, 14 + ... + 5769.

It is an arithmetic number, because the mean of its divisors is an integer number (3123360).

Almost surely, 2^16643474 is an apocalyptic number.

16643474 is a deficient number, since it is larger than the sum of its proper divisors (8343406).

16643474 is a wasteful number, since it uses less digits than its factorization.

16643474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7224.

The product of its digits is 48384, while the sum is 35.

The square root of 16643474 is about 4079.6414058101. The cubic root of 16643474 is about 255.3179374008.

The spelling of 16643474 in words is "sixteen million, six hundred forty-three thousand, four hundred seventy-four".