20013033123 has 24 divisors (see below), whose sum is σ = 30339586368. Its totient is φ = 13181261544.

The previous prime is 20013033077. The next prime is 20013033167. The reversal of 20013033123 is 32133031002.

20013033123 is a `hidden beast` number, since 200 + 130 + 331 + 2 + 3 = 666.

It is not a de Polignac number, because 20013033123 - 2¹³ = 20013024931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20013033096 and 20013033105.

It is not an unprimeable number, because it can be changed into a prime (20013013123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 475965 + ... + 516302.

It is an arithmetic number, because the mean of its divisors is an integer number (1264149432).

Almost surely, 2^20013033123 is an apocalyptic number.

20013033123 is a deficient number, since it is larger than the sum of its proper divisors (10326553245).

20013033123 is an frugal number, since it uses more digits than its factorization.

20013033123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992365 (or 992353 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 20013033123 its reverse (32133031002), we get a palindrome (52146064125).

The spelling of 20013033123 in words is "twenty billion, thirteen million, thirty-three thousand, one hundred twenty-three".