20312120303 has 16 divisors (see below), whose sum is σ = 20793760512. Its totient is φ = 19837440000.

The previous prime is 20312120299. The next prime is 20312120357. The reversal of 20312120303 is 30302121302.

It is a cyclic number.

It is not a de Polignac number, because 20312120303 - 2² = 20312120299 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312120383) 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, 2640623 + ... + 2648303.

It is an arithmetic number, because the mean of its divisors is an integer number (1299610032).

Almost surely, 2^20312120303 is an apocalyptic number.

20312120303 is a deficient number, since it is larger than the sum of its proper divisors (481640209).

20312120303 is a wasteful number, since it uses less digits than its factorization.

20312120303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8126.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20312120303 its reverse (30302121302), we get a palindrome (50614241605).

Subtracting 20312120303 from its reverse (30302121302), we obtain a palindrome (9990000999).

The spelling of 20312120303 in words is "twenty billion, three hundred twelve million, one hundred twenty thousand, three hundred three".