21022340232 has 32 divisors (see below), whose sum is σ = 52791540480. Its totient is φ = 6976021440.

The previous prime is 21022340203. The next prime is 21022340249. The reversal of 21022340232 is 23204322012.

It is a junction number, because it is equal to n+sod(n) for n = 21022340199 and 21022340208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1958619 + ... + 1969322.

It is an arithmetic number, because the mean of its divisors is an integer number (1649735640).

Almost surely, 2^21022340232 is an apocalyptic number.

It is an amenable number.

21022340232 is an abundant number, since it is smaller than the sum of its proper divisors (31769200248).

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

21022340232 is a wasteful number, since it uses less digits than its factorization.

21022340232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3928173 (or 3928169 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21022340232 its reverse (23204322012), we get a palindrome (44226662244).

The spelling of 21022340232 in words is "twenty-one billion, twenty-two million, three hundred forty thousand, two hundred thirty-two".