21201333539 has 8 divisors (see below), whose sum is σ = 22454252208. Its totient is φ = 19949057280.

The previous prime is 21201333529. The next prime is 21201333547. The reversal of 21201333539 is 93533310212.

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

It is a cyclic number.

It is not a de Polignac number, because 21201333539 - 2²⁸ = 20932898083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21201333509) 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, 91802 + ... + 225455.

It is an arithmetic number, because the mean of its divisors is an integer number (2806781526).

Almost surely, 2^21201333539 is an apocalyptic number.

21201333539 is a deficient number, since it is larger than the sum of its proper divisors (1252918669).

21201333539 is a wasteful number, since it uses less digits than its factorization.

21201333539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321205.

The product of its (nonzero) digits is 14580, while the sum is 32.

The spelling of 21201333539 in words is "twenty-one billion, two hundred one million, three hundred thirty-three thousand, five hundred thirty-nine".