21054140633732 has 12 divisors (see below), whose sum is σ = 36871082606400. Its totient is φ = 10519545603336.

The previous prime is 21054140633699. The next prime is 21054140633741. The reversal of 21054140633732 is 23733604145012.

It is a self number, because there is not a number n which added to its sum of digits gives 21054140633732.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1881172088 + ... + 1881183279.

It is an arithmetic number, because the mean of its divisors is an integer number (3072590217200).

Almost surely, 2^{21054140633732} is an apocalyptic number.

It is an amenable number.

21054140633732 is a deficient number, since it is larger than the sum of its proper divisors (15816941972668).

21054140633732 is a wasteful number, since it uses less digits than its factorization.

21054140633732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3762356770 (or 3762356768 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 41.

Adding to 21054140633732 its reverse (23733604145012), we get a palindrome (44787744778744).

The spelling of 21054140633732 in words is "twenty-one trillion, fifty-four billion, one hundred forty million, six hundred thirty-three thousand, seven hundred thirty-two".