16643454 has 16 divisors (see below), whose sum is σ = 33631248. Its totient is φ = 5490432.

The previous prime is 16643453. The next prime is 16643479. The reversal of 16643454 is 45434661.

It is a super-2 number, since 2×16643454² = 554009122100232, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16643453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13717 + ... + 14880.

It is an arithmetic number, because the mean of its divisors is an integer number (2101953).

Almost surely, 2^16643454 is an apocalyptic number.

16643454 is an abundant number, since it is smaller than the sum of its proper divisors (16987794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16643454 is a wasteful number, since it uses less digits than its factorization.

16643454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28699.

The product of its digits is 34560, while the sum is 33.

The square root of 16643454 is about 4079.6389546135. The cubic root of 16643454 is about 255.3178351312.

The spelling of 16643454 in words is "sixteen million, six hundred forty-three thousand, four hundred fifty-four".