21866674004 has 24 divisors (see below), whose sum is σ = 44349314688. Its totient is φ = 9239438880.

The previous prime is 21866674003. The next prime is 21866674117. The reversal of 21866674004 is 40047666812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21866674003) 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, 5497679 + ... + 5501654.

It is an arithmetic number, because the mean of its divisors is an integer number (1847888112).

Almost surely, 2^21866674004 is an apocalyptic number.

It is an amenable number.

21866674004 is an abundant number, since it is smaller than the sum of its proper divisors (22482640684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21866674004 is a wasteful number, since it uses less digits than its factorization.

21866674004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10999415 (or 10999413 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 21866674004 in words is "twenty-one billion, eight hundred sixty-six million, six hundred seventy-four thousand, four".