4002642218 has 4 divisors (see below), whose sum is σ = 6003963330. Its totient is φ = 2001321108.

The previous prime is 4002642209. The next prime is 4002642227. The reversal of 4002642218 is 8122462004.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (4002642209) and next prime (4002642227).

It can be written as a sum of positive squares in only one way, i.e., 3233855689 + 768786529 = 56867^2 + 27727^2 .

It is a super-2 number, since 2×4002642218² = 32042289450631919048, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000660553 + ... + 1000660556.

Almost surely, 2^4002642218 is an apocalyptic number.

4002642218 is a deficient number, since it is larger than the sum of its proper divisors (2001321112).

4002642218 is a wasteful number, since it uses less digits than its factorization.

4002642218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001321111.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 4002642218 is about 63266.4383223839. The cubic root of 4002642218 is about 1587.7504966731.

The spelling of 4002642218 in words is "four billion, two million, six hundred forty-two thousand, two hundred eighteen".