21866672002 has 8 divisors (see below), whose sum is σ = 37485723456. Its totient is φ = 9371430852.

The previous prime is 21866671999. The next prime is 21866672029. The reversal of 21866672002 is 20027666812.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 780952558 + ... + 780952585.

It is an arithmetic number, because the mean of its divisors is an integer number (4685715432).

Almost surely, 2^21866672002 is an apocalyptic number.

21866672002 is a deficient number, since it is larger than the sum of its proper divisors (15619051454).

21866672002 is a wasteful number, since it uses less digits than its factorization.

21866672002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561905152.

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 21866672002 in words is "twenty-one billion, eight hundred sixty-six million, six hundred seventy-two thousand, two".