21300224043 has 32 divisors (see below), whose sum is σ = 32920485376. Its totient is φ = 11998119168.

The previous prime is 21300224039. The next prime is 21300224059. The reversal of 21300224043 is 34042200312.

It is not a de Polignac number, because 21300224043 - 2² = 21300224039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21300224063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4294521 + ... + 4299477.

It is an arithmetic number, because the mean of its divisors is an integer number (1028765168).

Almost surely, 2^21300224043 is an apocalyptic number.

21300224043 is a deficient number, since it is larger than the sum of its proper divisors (11620261333).

21300224043 is a wasteful number, since it uses less digits than its factorization.

21300224043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7843.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21300224043 its reverse (34042200312), we get a palindrome (55342424355).

The spelling of 21300224043 in words is "twenty-one billion, three hundred million, two hundred twenty-four thousand, forty-three".