10638983893 has 4 divisors (see below), whose sum is σ = 10639508320. Its totient is φ = 10638459468.

The previous prime is 10638983879. The next prime is 10638983909. The reversal of 10638983893 is 39838983601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39838983601 = 113 ⋅352557377.

It is a cyclic number.

It is not a de Polignac number, because 10638983893 - 2²⁹ = 10102112981 is a prime.

It is a super-2 number, since 2×10638983893² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10638983813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230505 + ... + 272782.

It is an arithmetic number, because the mean of its divisors is an integer number (2659877080).

Almost surely, 2^10638983893 is an apocalyptic number.

It is an amenable number.

10638983893 is a deficient number, since it is larger than the sum of its proper divisors (524427).

10638983893 is an equidigital number, since it uses as much as digits as its factorization.

10638983893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524426.

The product of its (nonzero) digits is 6718464, while the sum is 58.

The spelling of 10638983893 in words is "ten billion, six hundred thirty-eight million, nine hundred eighty-three thousand, eight hundred ninety-three".