21000014035 has 144 divisors (see below), whose sum is σ = 35915745600. Its totient is φ = 11661027840.

The previous prime is 21000013973. The next prime is 21000014041. The reversal of 21000014035 is 53041000012.

It is not a de Polignac number, because 21000014035 - 2⁷ = 21000013907 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 11175226 + ... + 11177104.

It is an arithmetic number, because the mean of its divisors is an integer number (249414900).

Almost surely, 2^21000014035 is an apocalyptic number.

21000014035 is a deficient number, since it is larger than the sum of its proper divisors (14915731565).

21000014035 is a wasteful number, since it uses less digits than its factorization.

21000014035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962 (or 1944 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

Adding to 21000014035 its reverse (53041000012), we get a palindrome (74041014047).

The spelling of 21000014035 in words is "twenty-one billion, fourteen thousand, thirty-five".