21354617113044 has 48 divisors (see below), whose sum is σ = 52461201979200. Its totient is φ = 6742114914816.

The previous prime is 21354617112979. The next prime is 21354617113097. The reversal of 21354617113044 is 44031171645312.

It is a super-2 number, since 2×21354617113044² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21354617112987 and 21354617113005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8994099 + ... + 11117690.

It is an arithmetic number, because the mean of its divisors is an integer number (1092941707900).

Almost surely, 2^{21354617113044} is an apocalyptic number.

It is an amenable number.

21354617113044 is an abundant number, since it is smaller than the sum of its proper divisors (31106584866156).

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

21354617113044 is a wasteful number, since it uses less digits than its factorization.

21354617113044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20116472 (or 20116470 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

Adding to 21354617113044 its reverse (44031171645312), we get a palindrome (65385788758356).

The spelling of 21354617113044 in words is "twenty-one trillion, three hundred fifty-four billion, six hundred seventeen million, one hundred thirteen thousand, forty-four".