16643452 has 24 divisors (see below), whose sum is σ = 33997824. Its totient is φ = 6980592.

The previous prime is 16643447. The next prime is 16643453. The reversal of 16643452 is 25434661.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5008 + ... + 7639.

It is an arithmetic number, because the mean of its divisors is an integer number (1416576).

Almost surely, 2^16643452 is an apocalyptic number.

It is an amenable number.

16643452 is an abundant number, since it is smaller than the sum of its proper divisors (17354372).

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

16643452 is a wasteful number, since it uses less digits than its factorization.

16643452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12705 (or 12703 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 16643452 is about 4079.6387094938. The cubic root of 16643452 is about 255.3178249043.

It can be divided in two parts, 166434 and 52, that multiplied together give a palindrome (8654568).

The spelling of 16643452 in words is "sixteen million, six hundred forty-three thousand, four hundred fifty-two".