18312029 has 8 divisors (see below), whose sum is σ = 19320000. Its totient is φ = 17308512.

The previous prime is 18312013. The next prime is 18312037. The reversal of 18312029 is 92021381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18312029 - 2⁴ = 18312013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18311989 and 18312007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18312059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10577 + ... + 12185.

It is an arithmetic number, because the mean of its divisors is an integer number (2415000).

Almost surely, 2^18312029 is an apocalyptic number.

18312029 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18312029 is a deficient number, since it is larger than the sum of its proper divisors (1007971).

18312029 is a wasteful number, since it uses less digits than its factorization.

18312029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2227.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 18312029 is about 4279.2556595745. The cubic root of 18312029 is about 263.5798192393.

The spelling of 18312029 in words is "eighteen million, three hundred twelve thousand, twenty-nine".