21202033338 has 64 divisors (see below), whose sum is σ = 47974723200. Its totient is φ = 7026241968.

The previous prime is 21202033331. The next prime is 21202033357. The reversal of 21202033338 is 83333020212.

21202033338 is a `hidden beast` number, since 2 + 120 + 203 + 3 + 338 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21202033331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 742693 + ... + 770711.

It is an arithmetic number, because the mean of its divisors is an integer number (749605050).

Almost surely, 2^21202033338 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21202033338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23987361600).

21202033338 is an abundant number, since it is smaller than the sum of its proper divisors (26772689862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21202033338 is an equidigital number, since it uses as much as digits as its factorization.

21202033338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28215 (or 28197 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The spelling of 21202033338 in words is "twenty-one billion, two hundred two million, thirty-three thousand, three hundred thirty-eight".