18888007 has 2 divisors, whose sum is σ = 18888008. Its totient is φ = 18888006.

The previous prime is 18887993. The next prime is 18888011. The reversal of 18888007 is 70088881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18888007 - 2²³ = 10499399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18888017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9444003 + 9444004.

It is an arithmetic number, because the mean of its divisors is an integer number (9444004).

Almost surely, 2^18888007 is an apocalyptic number.

18888007 is a deficient number, since it is larger than the sum of its proper divisors (1).

18888007 is an equidigital number, since it uses as much as digits as its factorization.

18888007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28672, while the sum is 40.

The square root of 18888007 is about 4346.0334789323. The cubic root of 18888007 is about 266.3148466294.

The spelling of 18888007 in words is "eighteen million, eight hundred eighty-eight thousand, seven".