16421936 has 10 divisors (see below), whose sum is σ = 31817532. Its totient is φ = 8210960.

The previous prime is 16421897. The next prime is 16421963. The reversal of 16421936 is 63912461.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 513170 + ... + 513201.

Almost surely, 2^16421936 is an apocalyptic number.

16421936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16421936 is a deficient number, since it is larger than the sum of its proper divisors (15395596).

16421936 is a wasteful number, since it uses less digits than its factorization.

16421936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026379 (or 1026373 counting only the distinct ones).

The product of its digits is 7776, while the sum is 32.

The square root of 16421936 is about 4052.3987957752. The cubic root of 16421936 is about 254.1800447078.

The spelling of 16421936 in words is "sixteen million, four hundred twenty-one thousand, nine hundred thirty-six".