21214580054660 has 24 divisors (see below), whose sum is σ = 44557115503320. Its totient is φ = 8484594424064.

The previous prime is 21214580054621. The next prime is 21214580054779. The reversal of 21214580054660 is 6645008541212.

It can be written as a sum of positive squares in 4 ways, for example, as 2370854698564 + 18843725356096 = 1539758^2 + 4340936^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77209295 + ... + 77483574.

It is an arithmetic number, because the mean of its divisors is an integer number (1856546479305).

Almost surely, 2^{21214580054660} is an apocalyptic number.

21214580054660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21214580054660 is an abundant number, since it is smaller than the sum of its proper divisors (23342535448660).

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

21214580054660 is a wasteful number, since it uses less digits than its factorization.

21214580054660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154699735 (or 154699733 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 44.

Adding to 21214580054660 its reverse (6645008541212), we get a palindrome (27859588595872).

The spelling of 21214580054660 in words is "twenty-one trillion, two hundred fourteen billion, five hundred eighty million, fifty-four thousand, six hundred sixty".