18813029 has 4 divisors (see below), whose sum is σ = 19039776. Its totient is φ = 18586284.

The previous prime is 18813023. The next prime is 18813043. The reversal of 18813029 is 92031881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92031881 = 2027 ⋅45403.

It is a cyclic number.

It is not a de Polignac number, because 18813029 - 2⁴ = 18813013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18812986 and 18813004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18813023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113249 + ... + 113414.

It is an arithmetic number, because the mean of its divisors is an integer number (4759944).

Almost surely, 2^18813029 is an apocalyptic number.

It is an amenable number.

18813029 is a deficient number, since it is larger than the sum of its proper divisors (226747).

18813029 is an equidigital number, since it uses as much as digits as its factorization.

18813029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226746.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 18813029 is about 4337.3988749019. The cubic root of 18813029 is about 265.9619907248.

The spelling of 18813029 in words is "eighteen million, eight hundred thirteen thousand, twenty-nine".