21238158522060 has 384 divisors, whose sum is σ = 68236055596800. Its totient is φ = 5479997276160.

The previous prime is 21238158522059. The next prime is 21238158522083. The reversal of 21238158522060 is 6022585183212.

21238158522060 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 8 + 1 + 585 + 2 + 2 + 0 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 21238158521997 and 21238158522015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2743589790 + ... + 2743597530.

It is an arithmetic number, because the mean of its divisors is an integer number (177698061450).

Almost surely, 2^{21238158522060} is an apocalyptic number.

21238158522060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21238158522060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34118027798400).

21238158522060 is an abundant number, since it is smaller than the sum of its proper divisors (46997897074740).

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

21238158522060 is a wasteful number, since it uses less digits than its factorization.

21238158522060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8538 (or 8530 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The spelling of 21238158522060 in words is "twenty-one trillion, two hundred thirty-eight billion, one hundred fifty-eight million, five hundred twenty-two thousand, sixty".