18969454 has 16 divisors (see below), whose sum is σ = 32610528. Its totient is φ = 8106912.

The previous prime is 18969443. The next prime is 18969463. The reversal of 18969454 is 45496981.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

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, 3852 + ... + 7264.

It is an arithmetic number, because the mean of its divisors is an integer number (2038158).

Almost surely, 2^18969454 is an apocalyptic number.

18969454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18969454 is a deficient number, since it is larger than the sum of its proper divisors (13641074).

18969454 is a wasteful number, since it uses less digits than its factorization.

18969454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3819.

The product of its digits is 311040, while the sum is 46.

The square root of 18969454 is about 4355.3936676264. The cubic root of 18969454 is about 266.6970899317.

The spelling of 18969454 in words is "eighteen million, nine hundred sixty-nine thousand, four hundred fifty-four".