18880007 has 2 divisors, whose sum is σ = 18880008. Its totient is φ = 18880006.

The previous prime is 18879919. The next prime is 18880019. The reversal of 18880007 is 70008881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18880007 - 2²⁴ = 2102791 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18880087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9440003 + 9440004.

It is an arithmetic number, because the mean of its divisors is an integer number (9440004).

Almost surely, 2^18880007 is an apocalyptic number.

18880007 is a deficient number, since it is larger than the sum of its proper divisors (1).

18880007 is an equidigital number, since it uses as much as digits as its factorization.

18880007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 32.

The square root of 18880007 is about 4345.1130019828. The cubic root of 18880007 is about 266.2772421742.

Adding to 18880007 its reverse (70008881), we get a palindrome (88888888).

The spelling of 18880007 in words is "eighteen million, eight hundred eighty thousand, seven".