23403121203 has 32 divisors (see below), whose sum is σ = 39731650560. Its totient is φ = 11898790560.

The previous prime is 23403121187. The next prime is 23403121211. The reversal of 23403121203 is 30212130432.

It is not a de Polignac number, because 23403121203 - 2⁴ = 23403121187 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 23403121203.

It is not an unprimeable number, because it can be changed into a prime (23403121223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1066933 + ... + 1088646.

It is an arithmetic number, because the mean of its divisors is an integer number (1241614080).

Almost surely, 2^23403121203 is an apocalyptic number.

23403121203 is a deficient number, since it is larger than the sum of its proper divisors (16328529357).

23403121203 is a wasteful number, since it uses less digits than its factorization.

23403121203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2155647.

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

Adding to 23403121203 its reverse (30212130432), we get a palindrome (53615251635).

The spelling of 23403121203 in words is "twenty-three billion, four hundred three million, one hundred twenty-one thousand, two hundred three".