21533500201305 has 32 divisors (see below), whose sum is σ = 34478324438400. Its totient is φ = 11476294860800.

The previous prime is 21533500201277. The next prime is 21533500201313. The reversal of 21533500201305 is 50310200533512.

It is not a de Polignac number, because 21533500201305 - 2⁵ = 21533500201273 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127749721 + ... + 127918169.

It is an arithmetic number, because the mean of its divisors is an integer number (1077447638700).

Almost surely, 2^{21533500201305} is an apocalyptic number.

It is an amenable number.

21533500201305 is a deficient number, since it is larger than the sum of its proper divisors (12944824237095).

21533500201305 is a wasteful number, since it uses less digits than its factorization.

21533500201305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174521.

The product of its (nonzero) digits is 13500, while the sum is 30.

Adding to 21533500201305 its reverse (50310200533512), we get a palindrome (71843700734817).

The spelling of 21533500201305 in words is "twenty-one trillion, five hundred thirty-three billion, five hundred million, two hundred one thousand, three hundred five".