18257136 has 40 divisors (see below), whose sum is σ = 48319824. Its totient is φ = 5936640.

The previous prime is 18257131. The next prime is 18257159. The reversal of 18257136 is 63175281.

It is a super-4 number, since 4×18257136⁴ (a number of 30 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18257097 and 18257106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18257131) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2671 + ... + 6606.

Almost surely, 2^18257136 is an apocalyptic number.

18257136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18257136 is an abundant number, since it is smaller than the sum of its proper divisors (30062688).

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

18257136 is a wasteful number, since it uses less digits than its factorization.

18257136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9329 (or 9323 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 18257136 is about 4272.8369966569. The cubic root of 18257136 is about 263.3161825430.

The spelling of 18257136 in words is "eighteen million, two hundred fifty-seven thousand, one hundred thirty-six".