18361948 has 12 divisors (see below), whose sum is σ = 35054712. Its totient is φ = 8346320.

The previous prime is 18361897. The next prime is 18361957. The reversal of 18361948 is 84916381.

It is a super-2 number, since 2×18361948² = 674322268709408, 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 18361948.

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 in 3 ways as a sum of consecutive naturals, for example, 208615 + ... + 208702.

It is an arithmetic number, because the mean of its divisors is an integer number (2921226).

Almost surely, 2^18361948 is an apocalyptic number.

It is an amenable number.

18361948 is a deficient number, since it is larger than the sum of its proper divisors (16692764).

18361948 is a wasteful number, since it uses less digits than its factorization.

18361948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417332 (or 417330 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 18361948 is about 4285.0843632302. The cubic root of 18361948 is about 263.8191100913.

The spelling of 18361948 in words is "eighteen million, three hundred sixty-one thousand, nine hundred forty-eight".