16421711 has 4 divisors (see below), whose sum is σ = 17387712. Its totient is φ = 15455712.

The previous prime is 16421707. The next prime is 16421731. The reversal of 16421711 is 11712461.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16421711 - 2² = 16421707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16421731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482975 + ... + 483008.

It is an arithmetic number, because the mean of its divisors is an integer number (4346928).

Almost surely, 2^16421711 is an apocalyptic number.

16421711 is a deficient number, since it is larger than the sum of its proper divisors (966001).

16421711 is an equidigital number, since it uses as much as digits as its factorization.

16421711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966000.

The product of its digits is 336, while the sum is 23.

The square root of 16421711 is about 4052.3710343452. The cubic root of 16421711 is about 254.1788838464.

The spelling of 16421711 in words is "sixteen million, four hundred twenty-one thousand, seven hundred eleven".