21203332276 has 48 divisors (see below), whose sum is σ = 44266199040. Its totient is φ = 8688952800.

The previous prime is 21203332247. The next prime is 21203332277. The reversal of 21203332276 is 67223330212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203332277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2991705 + ... + 2998783.

It is an arithmetic number, because the mean of its divisors is an integer number (922212480).

Almost surely, 2^21203332276 is an apocalyptic number.

It is an amenable number.

21203332276 is an abundant number, since it is smaller than the sum of its proper divisors (23062866764).

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

21203332276 is a wasteful number, since it uses less digits than its factorization.

21203332276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11764 (or 11762 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 31.

Adding to 21203332276 its reverse (67223330212), we get a palindrome (88426662488).

The spelling of 21203332276 in words is "twenty-one billion, two hundred three million, three hundred thirty-two thousand, two hundred seventy-six".