21560213480442 has 64 divisors (see below), whose sum is σ = 55864520785920. Its totient is φ = 5386935927744.

The previous prime is 21560213480419. The next prime is 21560213480459. The reversal of 21560213480442 is 24408431206512.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 21560213480394 and 21560213480403.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1039136218 + ... + 1039156965.

It is an arithmetic number, because the mean of its divisors is an integer number (872883137280).

Almost surely, 2^{21560213480442} is an apocalyptic number.

21560213480442 is an abundant number, since it is smaller than the sum of its proper divisors (34304307305478).

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

21560213480442 is a wasteful number, since it uses less digits than its factorization.

21560213480442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2078293227.

The product of its (nonzero) digits is 368640, while the sum is 42.

Adding to 21560213480442 its reverse (24408431206512), we get a palindrome (45968644686954).

The spelling of 21560213480442 in words is "twenty-one trillion, five hundred sixty billion, two hundred thirteen million, four hundred eighty thousand, four hundred forty-two".