21003365014 has 16 divisors (see below), whose sum is σ = 32597244000. Its totient is φ = 10137746304.

The previous prime is 21003364961. The next prime is 21003365021. The reversal of 21003365014 is 41056330012.

It is a super-2 number, since 2×21003365014² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21003365014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330334 + ... + 388750.

It is an arithmetic number, because the mean of its divisors is an integer number (2037327750).

Almost surely, 2^21003365014 is an apocalyptic number.

21003365014 is a deficient number, since it is larger than the sum of its proper divisors (11593878986).

21003365014 is a wasteful number, since it uses less digits than its factorization.

21003365014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64647.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 21003365014 its reverse (41056330012), we get a palindrome (62059695026).

The spelling of 21003365014 in words is "twenty-one billion, three million, three hundred sixty-five thousand, fourteen".