21203322342 has 32 divisors (see below), whose sum is σ = 43631216352. Its totient is φ = 6864367104.

The previous prime is 21203322341. The next prime is 21203322367. The reversal of 21203322342 is 24322330212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203322341) 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, 37918 + ... + 209390.

It is an arithmetic number, because the mean of its divisors is an integer number (1363475511).

Almost surely, 2^21203322342 is an apocalyptic number.

21203322342 is an abundant number, since it is smaller than the sum of its proper divisors (22427894010).

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

21203322342 is a wasteful number, since it uses less digits than its factorization.

21203322342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172072.

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 21203322342 its reverse (24322330212), we get a palindrome (45525652554).

The spelling of 21203322342 in words is "twenty-one billion, two hundred three million, three hundred twenty-two thousand, three hundred forty-two".