18906029 has 4 divisors (see below), whose sum is σ = 18955776. Its totient is φ = 18856284.

The previous prime is 18905963. The next prime is 18906031. The reversal of 18906029 is 92060981.

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: 92060981 = 107 ⋅860383.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18906029 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18906029.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18906049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24299 + ... + 25064.

It is an arithmetic number, because the mean of its divisors is an integer number (4738944).

Almost surely, 2^18906029 is an apocalyptic number.

It is an amenable number.

18906029 is a deficient number, since it is larger than the sum of its proper divisors (49747).

18906029 is an equidigital number, since it uses as much as digits as its factorization.

18906029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49746.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 18906029 is about 4348.1063694441. The cubic root of 18906029 is about 266.3995211795.

The spelling of 18906029 in words is "eighteen million, nine hundred six thousand, twenty-nine".