18764943 has 8 divisors (see below), whose sum is σ = 25882800. Its totient is φ = 12078528.

The previous prime is 18764929. The next prime is 18764953. The reversal of 18764943 is 34946781.

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

It is not a de Polignac number, because 18764943 - 2⁸ = 18764687 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18764895 and 18764904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18764903) 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 7 ways as a sum of consecutive naturals, for example, 107758 + ... + 107931.

It is an arithmetic number, because the mean of its divisors is an integer number (3235350).

Almost surely, 2^18764943 is an apocalyptic number.

18764943 is a deficient number, since it is larger than the sum of its proper divisors (7117857).

18764943 is a wasteful number, since it uses less digits than its factorization.

18764943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215721.

The product of its digits is 145152, while the sum is 42.

The square root of 18764943 is about 4331.8521442912. The cubic root of 18764943 is about 265.7351982533.

The spelling of 18764943 in words is "eighteen million, seven hundred sixty-four thousand, nine hundred forty-three".