18954871 has 12 divisors (see below), whose sum is σ = 20883960. Its totient is φ = 17191200.

The previous prime is 18954853. The next prime is 18954883. The reversal of 18954871 is 17845981.

It is a happy number.

It is not a de Polignac number, because 18954871 - 2⁵ = 18954839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18954811) 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 11 ways as a sum of consecutive naturals, for example, 9021 + ... + 10921.

It is an arithmetic number, because the mean of its divisors is an integer number (1740330).

Almost surely, 2^18954871 is an apocalyptic number.

18954871 is a deficient number, since it is larger than the sum of its proper divisors (1929089).

18954871 is a wasteful number, since it uses less digits than its factorization.

18954871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986 (or 1973 counting only the distinct ones).

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

The square root of 18954871 is about 4353.7192146486. The cubic root of 18954871 is about 266.6287301936.

The spelling of 18954871 in words is "eighteen million, nine hundred fifty-four thousand, eight hundred seventy-one".