20838044893 has 4 divisors (see below), whose sum is σ = 20838376000. Its totient is φ = 20837713788.

The previous prime is 20838044869. The next prime is 20838044897. The reversal of 20838044893 is 39844083802.

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.

It is a cyclic number.

It is not a de Polignac number, because 20838044893 - 2⁵ = 20838044861 is a prime.

It is a super-2 number, since 2×20838044893² (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 (20838044897) 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, 38805 + ... + 207802.

It is an arithmetic number, because the mean of its divisors is an integer number (5209594000).

Almost surely, 2^20838044893 is an apocalyptic number.

It is an amenable number.

20838044893 is a deficient number, since it is larger than the sum of its proper divisors (331107).

20838044893 is an equidigital number, since it uses as much as digits as its factorization.

20838044893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331106.

The product of its (nonzero) digits is 1327104, while the sum is 49.

The spelling of 20838044893 in words is "twenty billion, eight hundred thirty-eight million, forty-four thousand, eight hundred ninety-three".