16377621 has 12 divisors (see below), whose sum is σ = 23646528. Its totient is φ = 10078224.

The previous prime is 16377619. The next prime is 16377629. The reversal of 16377621 is 12677361.

It is not a de Polignac number, because 16377621 - 2¹ = 16377619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16377629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15645 + ... + 16658.

It is an arithmetic number, because the mean of its divisors is an integer number (1970544).

Almost surely, 2^16377621 is an apocalyptic number.

It is an amenable number.

16377621 is a deficient number, since it is larger than the sum of its proper divisors (7268907).

16377621 is a wasteful number, since it uses less digits than its factorization.

16377621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32332 (or 32319 counting only the distinct ones).

The product of its digits is 10584, while the sum is 33.

The square root of 16377621 is about 4046.9273529432. The cubic root of 16377621 is about 253.9512016946.

The spelling of 16377621 in words is "sixteen million, three hundred seventy-seven thousand, six hundred twenty-one".