21023301332 has 18 divisors (see below), whose sum is σ = 40439450394. Its totient is φ = 9556045840.

The previous prime is 21023301331. The next prime is 21023301337. The reversal of 21023301332 is 23310332012.

It can be written as a sum of positive squares in only one way, i.e., 13688064016 + 7335237316 = 116996^2 + 85646^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023301331) 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 5 ways as a sum of consecutive naturals, for example, 21717803 + ... + 21718770.

It is an arithmetic number, because the mean of its divisors is an integer number (2246636133).

Almost surely, 2^21023301332 is an apocalyptic number.

21023301332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21023301332 is a deficient number, since it is larger than the sum of its proper divisors (19416149062).

21023301332 is a wasteful number, since it uses less digits than its factorization.

21023301332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43436599 (or 43436586 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21023301332 its reverse (23310332012), we get a palindrome (44333633344).

The spelling of 21023301332 in words is "twenty-one billion, twenty-three million, three hundred one thousand, three hundred thirty-two".