2218936473 has 24 divisors (see below), whose sum is σ = 3453494408. Its totient is φ = 1364781312.

The previous prime is 2218936471. The next prime is 2218936481. The reversal of 2218936473 is 3746398122.

2218936473 is a `hidden beast` number, since 2 + 218 + 9 + 364 + 73 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 235837449 + 1983099024 = 15357^2 + 44532^2 .

It is not a de Polignac number, because 2218936473 - 2¹ = 2218936471 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2218936471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 295461 + ... + 302877.

Almost surely, 2^2218936473 is an apocalyptic number.

It is an amenable number.

2218936473 is a deficient number, since it is larger than the sum of its proper divisors (1234557935).

2218936473 is a wasteful number, since it uses less digits than its factorization.

2218936473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9993 (or 9990 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 2218936473 is about 47105.5885538011. The cubic root of 2218936473 is about 1304.3123994724.

The spelling of 2218936473 in words is "two billion, two hundred eighteen million, nine hundred thirty-six thousand, four hundred seventy-three".