20123212303 has 16 divisors (see below), whose sum is σ = 21842110080. Its totient is φ = 18478965024.

The previous prime is 20123212289. The next prime is 20123212327. The reversal of 20123212303 is 30321232102.

It is a cyclic number.

It is not a de Polignac number, because 20123212303 - 2⁹ = 20123211791 is a prime.

It is a super-2 number, since 2×20123212303² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123215303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36801 + ... + 203962.

It is an arithmetic number, because the mean of its divisors is an integer number (1365131880).

Almost surely, 2^20123212303 is an apocalyptic number.

20123212303 is a deficient number, since it is larger than the sum of its proper divisors (1718897777).

20123212303 is a wasteful number, since it uses less digits than its factorization.

20123212303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240918.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20123212303 its reverse (30321232102), we get a palindrome (50444444405).

The spelling of 20123212303 in words is "twenty billion, one hundred twenty-three million, two hundred twelve thousand, three hundred three".