21086852152872 has 256 divisors, whose sum is σ = 61023037132800. Its totient is φ = 6001199124480.

The previous prime is 21086852152841. The next prime is 21086852153051. The reversal of 21086852152872 is 27825125868012.

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 63 ways as a sum of consecutive naturals, for example, 7966319853 + ... + 7966322499.

It is an arithmetic number, because the mean of its divisors is an integer number (238371238800).

Almost surely, 2^{21086852152872} is an apocalyptic number.

21086852152872 is a gapful number since it is divisible by the number (22) 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 21086852152872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30511518566400).

21086852152872 is an abundant number, since it is smaller than the sum of its proper divisors (39936184979928).

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

21086852152872 is a wasteful number, since it uses less digits than its factorization.

21086852152872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5816 (or 5812 counting only the distinct ones).

The product of its (nonzero) digits is 8601600, while the sum is 57.

The spelling of 21086852152872 in words is "twenty-one trillion, eighty-six billion, eight hundred fifty-two million, one hundred fifty-two thousand, eight hundred seventy-two".