18113948 has 6 divisors (see below), whose sum is σ = 31699416. Its totient is φ = 9056972.

The previous prime is 18113939. The next prime is 18113957. The reversal of 18113948 is 84931181.

It is an interprime number because it is at equal distance from previous prime (18113939) and next prime (18113957).

It is a super-2 number, since 2×18113948² = 656230224293408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2264240 + ... + 2264247.

It is an arithmetic number, because the mean of its divisors is an integer number (5283236).

Almost surely, 2^18113948 is an apocalyptic number.

It is an amenable number.

18113948 is a deficient number, since it is larger than the sum of its proper divisors (13585468).

18113948 is a wasteful number, since it uses less digits than its factorization.

18113948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4528491 (or 4528489 counting only the distinct ones).

The product of its digits is 6912, while the sum is 35.

The square root of 18113948 is about 4256.0484019804. The cubic root of 18113948 is about 262.6259918235.

The spelling of 18113948 in words is "eighteen million, one hundred thirteen thousand, nine hundred forty-eight".