18954718 has 4 divisors (see below), whose sum is σ = 28432080. Its totient is φ = 9477358.

The previous prime is 18954697. The next prime is 18954721. The reversal of 18954718 is 81745981.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81745981 = 53 ⋅1542377.

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 as a sum of consecutive naturals, namely, 4738678 + ... + 4738681.

It is an arithmetic number, because the mean of its divisors is an integer number (7108020).

Almost surely, 2^18954718 is an apocalyptic number.

18954718 is a deficient number, since it is larger than the sum of its proper divisors (9477362).

18954718 is an equidigital number, since it uses as much as digits as its factorization.

18954718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9477361.

The product of its digits is 80640, while the sum is 43.

The square root of 18954718 is about 4353.7016434294. The cubic root of 18954718 is about 266.6280128001.

The spelling of 18954718 in words is "eighteen million, nine hundred fifty-four thousand, seven hundred eighteen".