21300021033 has 16 divisors (see below), whose sum is σ = 29906701440. Its totient is φ = 13458006144.

The previous prime is 21300020983. The next prime is 21300021101. The reversal of 21300021033 is 33012000312.

It is not a de Polignac number, because 21300021033 - 2⁶ = 21300020969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21300021733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1408516 + ... + 1423557.

It is an arithmetic number, because the mean of its divisors is an integer number (1869168840).

Almost surely, 2^21300021033 is an apocalyptic number.

21300021033 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21300021033 is a deficient number, since it is larger than the sum of its proper divisors (8606680407).

21300021033 is a wasteful number, since it uses less digits than its factorization.

21300021033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2832208.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21300021033 its reverse (33012000312), we get a palindrome (54312021345).

The spelling of 21300021033 in words is "twenty-one billion, three hundred million, twenty-one thousand, thirty-three".