16346421 has 32 divisors (see below), whose sum is σ = 29809920. Its totient is φ = 8620992.

The previous prime is 16346417. The next prime is 16346423. The reversal of 16346421 is 12464361.

16346421 is a `hidden beast` number, since 1 + 634 + 6 + 4 + 21 = 666.

It is not a de Polignac number, because 16346421 - 2² = 16346417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16346423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 870 + ... + 5783.

It is an arithmetic number, because the mean of its divisors is an integer number (931560).

Almost surely, 2^16346421 is an apocalyptic number.

It is an amenable number.

16346421 is a deficient number, since it is larger than the sum of its proper divisors (13463499).

16346421 is a wasteful number, since it uses less digits than its factorization.

16346421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6682 (or 6676 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 16346421 is about 4043.0707389310. The cubic root of 16346421 is about 253.7898369028.

The spelling of 16346421 in words is "sixteen million, three hundred forty-six thousand, four hundred twenty-one".