18297898894 has 16 divisors (see below), whose sum is σ = 29944436400. Its totient is φ = 8316554560.

The previous prime is 18297898849. The next prime is 18297898903. The reversal of 18297898894 is 49889879281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334242 + ... + 385114.

It is an arithmetic number, because the mean of its divisors is an integer number (1871527275).

Almost surely, 2^18297898894 is an apocalyptic number.

18297898894 is a deficient number, since it is larger than the sum of its proper divisors (11646537506).

18297898894 is a wasteful number, since it uses less digits than its factorization.

18297898894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67235.

The product of its digits is 167215104, while the sum is 73.

The spelling of 18297898894 in words is "eighteen billion, two hundred ninety-seven million, eight hundred ninety-eight thousand, eight hundred ninety-four".