21022800243 has 8 divisors (see below), whose sum is σ = 28287560400. Its totient is φ = 13886620128.

The previous prime is 21022800229. The next prime is 21022800251. The reversal of 21022800243 is 34200822012.

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

It is not a de Polignac number, because 21022800243 - 2¹⁸ = 21022538099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21022807243) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 32144628 + ... + 32145281.

It is an arithmetic number, because the mean of its divisors is an integer number (3535945050).

Almost surely, 2^21022800243 is an apocalyptic number.

21022800243 is a deficient number, since it is larger than the sum of its proper divisors (7264760157).

21022800243 is a wasteful number, since it uses less digits than its factorization.

21022800243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64290021.

The product of its (nonzero) digits is 1536, while the sum is 24.

The spelling of 21022800243 in words is "twenty-one billion, twenty-two million, eight hundred thousand, two hundred forty-three".