18385976 has 96 divisors (see below), whose sum is σ = 44323200. Its totient is φ = 7096320.

The previous prime is 18385973. The next prime is 18385979. The reversal of 18385976 is 67958381.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18385973) and next prime (18385979).

It is a super-2 number, since 2×18385976² = 676088226945152, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18385976.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18385973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 206540 + ... + 206628.

It is an arithmetic number, because the mean of its divisors is an integer number (461700).

Almost surely, 2^18385976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18385976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22161600).

18385976 is an abundant number, since it is smaller than the sum of its proper divisors (25937224).

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

18385976 is a wasteful number, since it uses less digits than its factorization.

18385976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 146 counting only the distinct ones).

The product of its digits is 362880, while the sum is 47.

The square root of 18385976 is about 4287.8871253801. The cubic root of 18385976 is about 263.9341356965.

The spelling of 18385976 in words is "eighteen million, three hundred eighty-five thousand, nine hundred seventy-six".