18950843 has 4 divisors (see below), whose sum is σ = 19087320. Its totient is φ = 18814368.

The previous prime is 18950837. The next prime is 18950851. The reversal of 18950843 is 34805981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34805981 = 7 ⋅4972283.

It is a cyclic number.

It is not a de Polignac number, because 18950843 - 2⁸ = 18950587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18950797 and 18950806.

It is not an unprimeable number, because it can be changed into a prime (18956843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68030 + ... + 68307.

It is an arithmetic number, because the mean of its divisors is an integer number (4771830).

Almost surely, 2^18950843 is an apocalyptic number.

18950843 is a deficient number, since it is larger than the sum of its proper divisors (136477).

18950843 is a wasteful number, since it uses less digits than its factorization.

18950843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136476.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 18950843 is about 4353.2565970776. The cubic root of 18950843 is about 266.6098422323.

The spelling of 18950843 in words is "eighteen million, nine hundred fifty thousand, eight hundred forty-three".