20838375390023 has 4 divisors (see below), whose sum is σ = 20838385830360. Its totient is φ = 20838364949688.

The previous prime is 20838375389947. The next prime is 20838375390031. The reversal of 20838375390023 is 32009357383802.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20838375390023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20838375396023) 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, 1188140 + ... + 6564177.

It is an arithmetic number, because the mean of its divisors is an integer number (5209596457590).

Almost surely, 2^{20838375390023} is an apocalyptic number.

20838375390023 is a deficient number, since it is larger than the sum of its proper divisors (10440337).

20838375390023 is an equidigital number, since it uses as much as digits as its factorization.

20838375390023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10440336.

The product of its (nonzero) digits is 6531840, while the sum is 53.

The spelling of 20838375390023 in words is "twenty trillion, eight hundred thirty-eight billion, three hundred seventy-five million, three hundred ninety thousand, twenty-three".