21242960559 has 32 divisors (see below), whose sum is σ = 31655232000. Its totient is φ = 14079312000.

The previous prime is 21242960551. The next prime is 21242960569. The reversal of 21242960559 is 95506924212.

21242960559 is a `hidden beast` number, since 2 + 1 + 2 + 4 + 2 + 96 + 0 + 559 = 666.

It is not a de Polignac number, because 21242960559 - 2³ = 21242960551 is a prime.

It is a super-2 number, since 2×21242960559² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21242960551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4056807 + ... + 4062039.

It is an arithmetic number, because the mean of its divisors is an integer number (989226000).

Almost surely, 2^21242960559 is an apocalyptic number.

21242960559 is a deficient number, since it is larger than the sum of its proper divisors (10412271441).

21242960559 is a wasteful number, since it uses less digits than its factorization.

21242960559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6092 (or 6086 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 21242960559 in words is "twenty-one billion, two hundred forty-two million, nine hundred sixty thousand, five hundred fifty-nine".