18877243 has 16 divisors (see below), whose sum is σ = 23927040. Its totient is φ = 14464800.

The previous prime is 18877223. The next prime is 18877247. The reversal of 18877243 is 34277881.

It is not a de Polignac number, because 18877243 - 2⁹ = 18876731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18877196 and 18877205.

It is not an unprimeable number, because it can be changed into a prime (18877247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2688 + ... + 6706.

It is an arithmetic number, because the mean of its divisors is an integer number (1495440).

Almost surely, 2^18877243 is an apocalyptic number.

18877243 is a deficient number, since it is larger than the sum of its proper divisors (5049797).

18877243 is a wasteful number, since it uses less digits than its factorization.

18877243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098.

The product of its digits is 75264, while the sum is 40.

The square root of 18877243 is about 4344.7949318696. The cubic root of 18877243 is about 266.2642473659.

The spelling of 18877243 in words is "eighteen million, eight hundred seventy-seven thousand, two hundred forty-three".