18949026243 has 16 divisors (see below), whose sum is σ = 29222597376. Its totient is φ = 10697556000.

The previous prime is 18949026197. The next prime is 18949026253. The reversal of 18949026243 is 34262094981.

It is not a de Polignac number, because 18949026243 - 2³⁴ = 1769157059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18949026192 and 18949026201.

It is not an unprimeable number, because it can be changed into a prime (18949026253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5434008 + ... + 5437493.

It is an arithmetic number, because the mean of its divisors is an integer number (1826412336).

Almost surely, 2^18949026243 is an apocalyptic number.

18949026243 is a deficient number, since it is larger than the sum of its proper divisors (10273571133).

18949026243 is a wasteful number, since it uses less digits than its factorization.

18949026243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10871594.

The product of its (nonzero) digits is 746496, while the sum is 48.

The spelling of 18949026243 in words is "eighteen billion, nine hundred forty-nine million, twenty-six thousand, two hundred forty-three".