21660562463042 has 32 divisors (see below), whose sum is σ = 34521822216000. Its totient is φ = 10163993419008.

The previous prime is 21660562463021. The next prime is 21660562463083. The reversal of 21660562463042 is 24036426506612.

It is a super-2 number, since 2×21660562463042² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128047334 + ... + 128216382.

It is an arithmetic number, because the mean of its divisors is an integer number (1078806944250).

Almost surely, 2^{21660562463042} is an apocalyptic number.

21660562463042 is a deficient number, since it is larger than the sum of its proper divisors (12861259752958).

21660562463042 is a wasteful number, since it uses less digits than its factorization.

21660562463042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200690.

The product of its (nonzero) digits is 2488320, while the sum is 47.

Adding to 21660562463042 its reverse (24036426506612), we get a palindrome (45696988969654).

The spelling of 21660562463042 in words is "twenty-one trillion, six hundred sixty billion, five hundred sixty-two million, four hundred sixty-three thousand, forty-two".