17949946 has 16 divisors (see below), whose sum is σ = 32391360. Its totient is φ = 7287840.

The previous prime is 17949931. The next prime is 17949949. The reversal of 17949946 is 64994971.

It is a super-2 number, since 2×17949946² = 644401122805832, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 17949946.

It is not an unprimeable number, because it can be changed into a prime (17949949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33475 + ... + 34006.

It is an arithmetic number, because the mean of its divisors is an integer number (2024460).

Almost surely, 2^17949946 is an apocalyptic number.

17949946 is a deficient number, since it is larger than the sum of its proper divisors (14441414).

17949946 is a wasteful number, since it uses less digits than its factorization.

17949946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67509.

The product of its digits is 489888, while the sum is 49.

The square root of 17949946 is about 4236.7376600399. The cubic root of 17949946 is about 261.8309905861.

The spelling of 17949946 in words is "seventeen million, nine hundred forty-nine thousand, nine hundred forty-six".