18630958 has 16 divisors (see below), whose sum is σ = 28526544. Its totient is φ = 9123840.

The previous prime is 18630923. The next prime is 18630959. The reversal of 18630958 is 85903681.

It is a happy number.

It is a super-2 number, since 2×18630958² = 694225191995528, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18630958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18630959) 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 7 ways as a sum of consecutive naturals, for example, 34168 + ... + 34708.

It is an arithmetic number, because the mean of its divisors is an integer number (1782909).

Almost surely, 2^18630958 is an apocalyptic number.

18630958 is a deficient number, since it is larger than the sum of its proper divisors (9895586).

18630958 is a wasteful number, since it uses less digits than its factorization.

18630958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 18630958 is about 4316.3593455596. The cubic root of 18630958 is about 265.1012215666.

The spelling of 18630958 in words is "eighteen million, six hundred thirty thousand, nine hundred fifty-eight".