18429907 has 2 divisors, whose sum is σ = 18429908. Its totient is φ = 18429906.

The previous prime is 18429899. The next prime is 18429973. The reversal of 18429907 is 70992481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18429907 - 2³ = 18429899 is a prime.

It is a super-2 number, since 2×18429907² = 679322944057298, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18429907.

It is not a weakly prime, because it can be changed into another prime (18429977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9214953 + 9214954.

It is an arithmetic number, because the mean of its divisors is an integer number (9214954).

Almost surely, 2^18429907 is an apocalyptic number.

18429907 is a deficient number, since it is larger than the sum of its proper divisors (1).

18429907 is an equidigital number, since it uses as much as digits as its factorization.

18429907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 18429907 is about 4293.0067551775. The cubic root of 18429907 is about 264.1441810757.

The spelling of 18429907 in words is "eighteen million, four hundred twenty-nine thousand, nine hundred seven".