21027040913 has 8 divisors (see below), whose sum is σ = 21555220608. Its totient is φ = 20503729584.

The previous prime is 21027040891. The next prime is 21027040919. The reversal of 21027040913 is 31904072012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21027040913 - 2²⁸ = 20758605457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21027040919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1208345 + ... + 1225622.

It is an arithmetic number, because the mean of its divisors is an integer number (2694402576).

Almost surely, 2^21027040913 is an apocalyptic number.

It is an amenable number.

21027040913 is a deficient number, since it is larger than the sum of its proper divisors (528179695).

21027040913 is a wasteful number, since it uses less digits than its factorization.

21027040913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2434183.

The product of its (nonzero) digits is 3024, while the sum is 29.

The spelling of 21027040913 in words is "twenty-one billion, twenty-seven million, forty thousand, nine hundred thirteen".