21924001366 has 16 divisors (see below), whose sum is σ = 33427868400. Its totient is φ = 10782655488.

The previous prime is 21924001303. The next prime is 21924001403. The reversal of 21924001366 is 66310042912.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284736 + ... + 353443.

It is an arithmetic number, because the mean of its divisors is an integer number (2089241775).

Almost surely, 2^21924001366 is an apocalyptic number.

21924001366 is a deficient number, since it is larger than the sum of its proper divisors (11503867034).

21924001366 is a wasteful number, since it uses less digits than its factorization.

21924001366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638463.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 21924001366 in words is "twenty-one billion, nine hundred twenty-four million, one thousand, three hundred sixty-six".