20103131323 has 4 divisors (see below), whose sum is σ = 21930688728. Its totient is φ = 18275573920.

The previous prime is 20103131303. The next prime is 20103131341. The reversal of 20103131323 is 32313130102.

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 20103131323 - 2⁵ = 20103131291 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20103131323.

It is not an unprimeable number, because it can be changed into a prime (20103131303) 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, 913778686 + ... + 913778707.

It is an arithmetic number, because the mean of its divisors is an integer number (5482672182).

Almost surely, 2^20103131323 is an apocalyptic number.

20103131323 is a deficient number, since it is larger than the sum of its proper divisors (1827557405).

20103131323 is a wasteful number, since it uses less digits than its factorization.

20103131323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827557404.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20103131323 its reverse (32313130102), we get a palindrome (52416261425).

The spelling of 20103131323 in words is "twenty billion, one hundred three million, one hundred thirty-one thousand, three hundred twenty-three".