21110930293 has 8 divisors (see below), whose sum is σ = 22354111512. Its totient is φ = 19867900416.

The previous prime is 21110930287. The next prime is 21110930297. The reversal of 21110930293 is 39203901112.

It can be written as a sum of positive squares in 4 ways, for example, as 11373582609 + 9737347684 = 106647^2 + 98678^2 .

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 21110930293 - 2³³ = 12520995701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110930297) 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, 383521 + ... + 435097.

It is an arithmetic number, because the mean of its divisors is an integer number (2794263939).

Almost surely, 2^21110930293 is an apocalyptic number.

It is an amenable number.

21110930293 is a deficient number, since it is larger than the sum of its proper divisors (1243181219).

21110930293 is a wasteful number, since it uses less digits than its factorization.

21110930293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75671.

The product of its (nonzero) digits is 2916, while the sum is 31.

The spelling of 21110930293 in words is "twenty-one billion, one hundred ten million, nine hundred thirty thousand, two hundred ninety-three".