16621436 has 48 divisors (see below), whose sum is σ = 32979744. Its totient is φ = 7278336.

The previous prime is 16621417. The next prime is 16621453. The reversal of 16621436 is 63412661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 16621399 and 16621408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101891 + ... + 102053.

It is an arithmetic number, because the mean of its divisors is an integer number (687078).

Almost surely, 2^16621436 is an apocalyptic number.

It is an amenable number.

16621436 is a deficient number, since it is larger than the sum of its proper divisors (16358308).

16621436 is a wasteful number, since it uses less digits than its factorization.

16621436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 268 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

The square root of 16621436 is about 4076.9395384283. The cubic root of 16621436 is about 255.2051968753.

The spelling of 16621436 in words is "sixteen million, six hundred twenty-one thousand, four hundred thirty-six".