2438666021 has 8 divisors (see below), whose sum is σ = 2662823424. Its totient is φ = 2214918720.

The previous prime is 2438666003. The next prime is 2438666053. The reversal of 2438666021 is 1206668342.

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

It is a cyclic number.

It is not a de Polignac number, because 2438666021 - 2¹⁰ = 2438664997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2438666071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90020 + ... + 113933.

It is an arithmetic number, because the mean of its divisors is an integer number (332852928).

Almost surely, 2^2438666021 is an apocalyptic number.

It is an amenable number.

2438666021 is a deficient number, since it is larger than the sum of its proper divisors (224157403).

2438666021 is a wasteful number, since it uses less digits than its factorization.

2438666021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205051.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 2438666021 is about 49382.8514871306. The cubic root of 2438666021 is about 1346.0177150158.

The spelling of 2438666021 in words is "two billion, four hundred thirty-eight million, six hundred sixty-six thousand, twenty-one".