18687097 has 16 divisors (see below), whose sum is σ = 23248512. Its totient is φ = 14757120.

The previous prime is 18687083. The next prime is 18687101. The reversal of 18687097 is 79078681.

It is a cyclic number.

It is not a de Polignac number, because 18687097 - 2¹¹ = 18685049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18687007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1413 + ... + 6274.

It is an arithmetic number, because the mean of its divisors is an integer number (1453032).

Almost surely, 2^18687097 is an apocalyptic number.

18687097 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

18687097 is a deficient number, since it is larger than the sum of its proper divisors (4561415).

18687097 is a wasteful number, since it uses less digits than its factorization.

18687097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7728.

The product of its (nonzero) digits is 169344, while the sum is 46.

The square root of 18687097 is about 4322.8575040128. The cubic root of 18687097 is about 265.3672231753.

The spelling of 18687097 in words is "eighteen million, six hundred eighty-seven thousand, ninety-seven".