20380396123 has 4 divisors (see below), whose sum is σ = 21037828288. Its totient is φ = 19722963960.

The previous prime is 20380396121. The next prime is 20380396147. The reversal of 20380396123 is 32169308302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20380396123 - 2¹ = 20380396121 is a prime.

It is a super-2 number, since 2×20380396123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20380396121) 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, 328716036 + ... + 328716097.

It is an arithmetic number, because the mean of its divisors is an integer number (5259457072).

Almost surely, 2^20380396123 is an apocalyptic number.

20380396123 is a deficient number, since it is larger than the sum of its proper divisors (657432165).

20380396123 is an equidigital number, since it uses as much as digits as its factorization.

20380396123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657432164.

The product of its (nonzero) digits is 46656, while the sum is 37.

The spelling of 20380396123 in words is "twenty billion, three hundred eighty million, three hundred ninety-six thousand, one hundred twenty-three".