18963956 has 12 divisors (see below), whose sum is σ = 36204000. Its totient is φ = 8619960.

The previous prime is 18963949. The next prime is 18963961. The reversal of 18963956 is 65936981.

It is a self number, because there is not a number n which added to its sum of digits gives 18963956.

It is a congruent number.

It is an unprimeable number.

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, 215456 + ... + 215543.

It is an arithmetic number, because the mean of its divisors is an integer number (3017000).

Almost surely, 2^18963956 is an apocalyptic number.

It is an amenable number.

18963956 is a deficient number, since it is larger than the sum of its proper divisors (17240044).

18963956 is a wasteful number, since it uses less digits than its factorization.

18963956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431014 (or 431012 counting only the distinct ones).

The product of its digits is 349920, while the sum is 47.

The square root of 18963956 is about 4354.7624504673. The cubic root of 18963956 is about 266.6713214465.

The spelling of 18963956 in words is "eighteen million, nine hundred sixty-three thousand, nine hundred fifty-six".