2218936474 has 8 divisors (see below), whose sum is σ = 3333944628. Its totient is φ = 1107621600.

The previous prime is 2218936471. The next prime is 2218936481. The reversal of 2218936474 is 4746398122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1975358025 + 243578449 = 44445^2 + 15607^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 921817 + ... + 924220.

Almost surely, 2^2218936474 is an apocalyptic number.

2218936474 is a deficient number, since it is larger than the sum of its proper divisors (1115008154).

2218936474 is a wasteful number, since it uses less digits than its factorization.

2218936474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846640.

The product of its digits is 580608, while the sum is 46.

The square root of 2218936474 is about 47105.5885644156. The cubic root of 2218936474 is about 1304.3123996684.

The spelling of 2218936474 in words is "two billion, two hundred eighteen million, nine hundred thirty-six thousand, four hundred seventy-four".