18857051 has 2 divisors, whose sum is σ = 18857052. Its totient is φ = 18857050.

The previous prime is 18857039. The next prime is 18857071. The reversal of 18857051 is 15075881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18857051 - 2¹⁰ = 18856027 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18857071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9428525 + 9428526.

It is an arithmetic number, because the mean of its divisors is an integer number (9428526).

Almost surely, 2^18857051 is an apocalyptic number.

18857051 is a deficient number, since it is larger than the sum of its proper divisors (1).

18857051 is an equidigital number, since it uses as much as digits as its factorization.

18857051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11200, while the sum is 35.

The square root of 18857051 is about 4342.4706101481. The cubic root of 18857051 is about 266.1692771810.

The spelling of 18857051 in words is "eighteen million, eight hundred fifty-seven thousand, fifty-one".