21003140550005 has 16 divisors (see below), whose sum is σ = 25463852124480. Its totient is φ = 16629126876672.

The previous prime is 21003140549987. The next prime is 21003140550031. The reversal of 21003140550005 is 50005504130012.

It is a cyclic number.

It is not a de Polignac number, because 21003140550005 - 2¹⁰ = 21003140548981 is a prime.

It is a super-2 number, since 2×21003140550005² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 80680262 + ... + 80940168.

It is an arithmetic number, because the mean of its divisors is an integer number (1591490757780).

Almost surely, 2^{21003140550005} is an apocalyptic number.

It is an amenable number.

21003140550005 is a deficient number, since it is larger than the sum of its proper divisors (4460711574475).

21003140550005 is a wasteful number, since it uses less digits than its factorization.

21003140550005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426628.

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 21003140550005 its reverse (50005504130012), we get a palindrome (71008644680017).

The spelling of 21003140550005 in words is "twenty-one trillion, three billion, one hundred forty million, five hundred fifty thousand, five".