18487151 has 2 divisors, whose sum is σ = 18487152. Its totient is φ = 18487150.

The previous prime is 18487111. The next prime is 18487153. The reversal of 18487151 is 15178481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18487151 - 2²² = 14292847 is a prime.

Together with 18487153, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18487153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9243575 + 9243576.

It is an arithmetic number, because the mean of its divisors is an integer number (9243576).

Almost surely, 2^18487151 is an apocalyptic number.

18487151 is a deficient number, since it is larger than the sum of its proper divisors (1).

18487151 is an equidigital number, since it uses as much as digits as its factorization.

18487151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 35.

The square root of 18487151 is about 4299.6687081681. The cubic root of 18487151 is about 264.4173790782.

The spelling of 18487151 in words is "eighteen million, four hundred eighty-seven thousand, one hundred fifty-one".