203123402013 has 16 divisors (see below), whose sum is σ = 310805703296. Its totient is φ = 115588892160.

The previous prime is 203123401993. The next prime is 203123402059. The reversal of 203123402013 is 310204321302.

203123402013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 203123402013 - 2⁵ = 203123401981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203123400013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20062456 + ... + 20072577.

It is an arithmetic number, because the mean of its divisors is an integer number (19425356456).

Almost surely, 2^203123402013 is an apocalyptic number.

It is an amenable number.

203123402013 is a deficient number, since it is larger than the sum of its proper divisors (107682301283).

203123402013 is a wasteful number, since it uses less digits than its factorization.

203123402013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40135284.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 203123402013 its reverse (310204321302), we get a palindrome (513327723315).

The spelling of 203123402013 in words is "two hundred three billion, one hundred twenty-three million, four hundred two thousand, thirteen".