21522656060 has 24 divisors (see below), whose sum is σ = 45468228960. Its totient is φ = 8557509824.

The previous prime is 21522655993. The next prime is 21522656093. The reversal of 21522656060 is 6065622512.

It is a self number, because there is not a number n which added to its sum of digits gives 21522656060.

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 7 ways as a sum of consecutive naturals, for example, 3218615 + ... + 3225294.

It is an arithmetic number, because the mean of its divisors is an integer number (1894509540).

Almost surely, 2^21522656060 is an apocalyptic number.

21522656060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21522656060 is an abundant number, since it is smaller than the sum of its proper divisors (23945572900).

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

21522656060 is a wasteful number, since it uses less digits than its factorization.

21522656060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6444085 (or 6444083 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 21522656060 in words is "twenty-one billion, five hundred twenty-two million, six hundred fifty-six thousand, sixty".