21003351350344 has 16 divisors (see below), whose sum is σ = 42961400489520. Its totient is φ = 9546977886480.

The previous prime is 21003351350309. The next prime is 21003351350357. The reversal of 21003351350344 is 44305315330012.

It is a super-2 number, since 2×21003351350344² (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 3 ways as a sum of consecutive naturals, for example, 119337223494 + ... + 119337223669.

It is an arithmetic number, because the mean of its divisors is an integer number (2685087530595).

Almost surely, 2^{21003351350344} is an apocalyptic number.

It is an amenable number.

21003351350344 is an abundant number, since it is smaller than the sum of its proper divisors (21958049139176).

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

21003351350344 is a wasteful number, since it uses less digits than its factorization.

21003351350344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238674447180 (or 238674447176 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 34.

Adding to 21003351350344 its reverse (44305315330012), we get a palindrome (65308666680356).

The spelling of 21003351350344 in words is "twenty-one trillion, three billion, three hundred fifty-one million, three hundred fifty thousand, three hundred forty-four".