21893242799 has 8 divisors (see below), whose sum is σ = 22081481520. Its totient is φ = 21705662016.

The previous prime is 21893242751. The next prime is 21893242817. The reversal of 21893242799 is 99724239812.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21893242799 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 (21893242999) 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, 97532 + ... + 230865.

It is an arithmetic number, because the mean of its divisors is an integer number (2760185190).

Almost surely, 2^21893242799 is an apocalyptic number.

21893242799 is a deficient number, since it is larger than the sum of its proper divisors (188238721).

21893242799 is a wasteful number, since it uses less digits than its factorization.

21893242799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328969.

The product of its digits is 3919104, while the sum is 56.

The spelling of 21893242799 in words is "twenty-one billion, eight hundred ninety-three million, two hundred forty-two thousand, seven hundred ninety-nine".