18257051 has 2 divisors, whose sum is σ = 18257052. Its totient is φ = 18257050.

The previous prime is 18257039. The next prime is 18257053. The reversal of 18257051 is 15075281.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18257051 - 2¹⁰ = 18256027 is a prime.

It is a super-4 number, since 4×18257051⁴ (a number of 30 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

Together with 18257053, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18257053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9128525 + 9128526.

It is an arithmetic number, because the mean of its divisors is an integer number (9128526).

Almost surely, 2^18257051 is an apocalyptic number.

18257051 is a deficient number, since it is larger than the sum of its proper divisors (1).

18257051 is an equidigital number, since it uses as much as digits as its factorization.

18257051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 18257051 is about 4272.8270500922. The cubic root of 18257051 is about 263.3157739008.

The spelling of 18257051 in words is "eighteen million, two hundred fifty-seven thousand, fifty-one".