16946405 has 18 divisors (see below), whose sum is σ = 23746086. Its totient is φ = 11576208.

The previous prime is 16946389. The next prime is 16946417. The reversal of 16946405 is 50464961.

It can be written as a sum of positive squares in only one way, i.e., 13557124 + 3389281 = 3682^2 + 1841^2 .

It is not a de Polignac number, because 16946405 - 2⁴ = 16946389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 64304 + ... + 64566.

It is an arithmetic number, because the mean of its divisors is an integer number (1319227).

Almost surely, 2^16946405 is an apocalyptic number.

It is an amenable number.

16946405 is a deficient number, since it is larger than the sum of its proper divisors (6799681).

16946405 is an frugal number, since it uses more digits than its factorization.

16946405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 16946405 is about 4116.6011465771. The cubic root of 16946405 is about 256.8576631622.

Multiplying 16946405 by its product of nonzero digits (25920), we get a square (439250817600 = 662760²).

The spelling of 16946405 in words is "sixteen million, nine hundred forty-six thousand, four hundred five".