18849629 has 4 divisors (see below), whose sum is σ = 18870684. Its totient is φ = 18828576.

The previous prime is 18849619. The next prime is 18849641. The reversal of 18849629 is 92694881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92694881 = 3697 ⋅25073.

It can be written as a sum of positive squares in 2 ways, for example, as 2244004 + 16605625 = 1498^2 + 4075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18849629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18849619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9122 + ... + 10995.

It is an arithmetic number, because the mean of its divisors is an integer number (4717671).

Almost surely, 2^18849629 is an apocalyptic number.

It is an amenable number.

18849629 is a deficient number, since it is larger than the sum of its proper divisors (21055).

18849629 is an equidigital number, since it uses as much as digits as its factorization.

18849629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21054.

The product of its digits is 248832, while the sum is 47.

The square root of 18849629 is about 4341.6159434017. The cubic root of 18849629 is about 266.1343518257.

The spelling of 18849629 in words is "eighteen million, eight hundred forty-nine thousand, six hundred twenty-nine".