21602422128 has 80 divisors (see below), whose sum is σ = 63812026880. Its totient is φ = 6168883968.

The previous prime is 21602422097. The next prime is 21602422133. The reversal of 21602422128 is 82122420612.

It is a junction number, because it is equal to n+sod(n) for n = 21602422095 and 21602422104.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 665901 + ... + 697587.

It is an arithmetic number, because the mean of its divisors is an integer number (797650336).

Almost surely, 2^21602422128 is an apocalyptic number.

21602422128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21602422128 is an abundant number, since it is smaller than the sum of its proper divisors (42209604752).

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

21602422128 is a wasteful number, since it uses less digits than its factorization.

21602422128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33734 (or 33728 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The spelling of 21602422128 in words is "twenty-one billion, six hundred two million, four hundred twenty-two thousand, one hundred twenty-eight".