18963243 has 12 divisors (see below), whose sum is σ = 29498560. Its totient is φ = 11669616.

The previous prime is 18963233. The next prime is 18963281. The reversal of 18963243 is 34236981.

18963243 is a `hidden beast` number, since 18 + 9 + 632 + 4 + 3 = 666.

It is not a de Polignac number, because 18963243 - 2⁶ = 18963179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18963198 and 18963207.

It is not an unprimeable number, because it can be changed into a prime (18963233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80923 + ... + 81156.

Almost surely, 2^18963243 is an apocalyptic number.

18963243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18963243 is a deficient number, since it is larger than the sum of its proper divisors (10535317).

18963243 is a wasteful number, since it uses less digits than its factorization.

18963243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162098 (or 162095 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 18963243 is about 4354.6805853013. The cubic root of 18963243 is about 266.6679793338.

The spelling of 18963243 in words is "eighteen million, nine hundred sixty-three thousand, two hundred forty-three".