18888971 has 8 divisors (see below), whose sum is σ = 19375104. Its totient is φ = 18406440.

The previous prime is 18888959. The next prime is 18888973. The reversal of 18888971 is 17988881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18888971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18888973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11996 + ... + 13478.

It is an arithmetic number, because the mean of its divisors is an integer number (2421888).

Almost surely, 2^18888971 is an apocalyptic number.

18888971 is a deficient number, since it is larger than the sum of its proper divisors (486133).

18888971 is a wasteful number, since it uses less digits than its factorization.

18888971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1801.

The product of its digits is 258048, while the sum is 50.

The square root of 18888971 is about 4346.1443832436. The cubic root of 18888971 is about 266.3193772493.

The spelling of 18888971 in words is "eighteen million, eight hundred eighty-eight thousand, nine hundred seventy-one".