21742563063231 has 32 divisors (see below), whose sum is σ = 32379119702720. Its totient is φ = 14419484946432.

The previous prime is 21742563063197. The next prime is 21742563063289. The reversal of 21742563063231 is 13236036524712.

It is a happy number.

21742563063231 is a `hidden beast` number, since 2 + 1 + 7 + 4 + 2 + 5 + 6 + 3 + 0 + 632 + 3 + 1 = 666.

It is not a de Polignac number, because 21742563063231 - 2⁷ = 21742563063103 is a prime.

It is a super-2 number, since 2×21742563063231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21742573063231) 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, 282799011 + ... + 282875883.

It is an arithmetic number, because the mean of its divisors is an integer number (1011847490710).

Almost surely, 2^{21742563063231} is an apocalyptic number.

21742563063231 is a deficient number, since it is larger than the sum of its proper divisors (10636556639489).

21742563063231 is a wasteful number, since it uses less digits than its factorization.

21742563063231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131352 (or 131346 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 45.

Adding to 21742563063231 its reverse (13236036524712), we get a palindrome (34978599587943).

The spelling of 21742563063231 in words is "twenty-one trillion, seven hundred forty-two billion, five hundred sixty-three million, sixty-three thousand, two hundred thirty-one".