18198976 has 56 divisors (see below), whose sum is σ = 39227760. Its totient is φ = 8343552.

The previous prime is 18198937. The next prime is 18198977. The reversal of 18198976 is 67989181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18198977) 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, 46590 + ... + 46978.

Almost surely, 2^18198976 is an apocalyptic number.

18198976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18198976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19613880).

18198976 is an abundant number, since it is smaller than the sum of its proper divisors (21028784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18198976 is a wasteful number, since it uses less digits than its factorization.

18198976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461 (or 451 counting only the distinct ones).

The product of its digits is 217728, while the sum is 49.

The square root of 18198976 is about 4266.0257852010. The cubic root of 18198976 is about 263.0362781089.

The spelling of 18198976 in words is "eighteen million, one hundred ninety-eight thousand, nine hundred seventy-six".