18772105 has 8 divisors (see below), whose sum is σ = 24574464. Its totient is φ = 13652400.

The previous prime is 18772099. The next prime is 18772121. The reversal of 18772105 is 50127781.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-18772105 is a prime.

It is a super-2 number, since 2×18772105² = 704783852262050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 170601 + ... + 170710.

It is an arithmetic number, because the mean of its divisors is an integer number (3071808).

Almost surely, 2^18772105 is an apocalyptic number.

It is an amenable number.

18772105 is a deficient number, since it is larger than the sum of its proper divisors (5802359).

18772105 is a wasteful number, since it uses less digits than its factorization.

18772105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341327.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 18772105 is about 4332.6787326087. The cubic root of 18772105 is about 265.7690015963.

Adding to 18772105 its reverse (50127781), we get a palindrome (68899886).

The spelling of 18772105 in words is "eighteen million, seven hundred seventy-two thousand, one hundred five".