18738897 has 8 divisors (see below), whose sum is σ = 25052640. Its totient is φ = 12458880.

The previous prime is 18738871. The next prime is 18738899. The reversal of 18738897 is 79883781.

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

It is not a de Polignac number, because 18738897 - 2¹¹ = 18736849 is a prime.

It is a super-2 number, since 2×18738897² = 702292521553218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18738899) 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, 7104 + ... + 9377.

It is an arithmetic number, because the mean of its divisors is an integer number (3131580).

Almost surely, 2^18738897 is an apocalyptic number.

It is an amenable number.

18738897 is a deficient number, since it is larger than the sum of its proper divisors (6313743).

18738897 is a wasteful number, since it uses less digits than its factorization.

18738897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16863.

The product of its digits is 677376, while the sum is 51.

The square root of 18738897 is about 4328.8447650615. The cubic root of 18738897 is about 265.6121932834.

The spelling of 18738897 in words is "eighteen million, seven hundred thirty-eight thousand, eight hundred ninety-seven".