18257041 has 4 divisors (see below), whose sum is σ = 19916784. Its totient is φ = 16597300.

The previous prime is 18257039. The next prime is 18257051. The reversal of 18257041 is 14075281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18257041 - 2¹ = 18257039 is a prime.

It is a super-4 number, since 4×18257041⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18257051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 829855 + ... + 829876.

It is an arithmetic number, because the mean of its divisors is an integer number (4979196).

Almost surely, 2^18257041 is an apocalyptic number.

18257041 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18257041 is a deficient number, since it is larger than the sum of its proper divisors (1659743).

18257041 is a wasteful number, since it uses less digits than its factorization.

18257041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659742.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 18257041 is about 4272.8258799066. The cubic root of 18257041 is about 263.3157258252.

The spelling of 18257041 in words is "eighteen million, two hundred fifty-seven thousand, forty-one".