20313033031 has 4 divisors (see below), whose sum is σ = 20785429192. Its totient is φ = 19840636872.

The previous prime is 20313033011. The next prime is 20313033067. The reversal of 20313033031 is 13033031302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20313033031 is a prime.

It is a super-2 number, since 2×20313033031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313033011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236198016 + ... + 236198101.

It is an arithmetic number, because the mean of its divisors is an integer number (5196357298).

Almost surely, 2^20313033031 is an apocalyptic number.

20313033031 is a deficient number, since it is larger than the sum of its proper divisors (472396161).

20313033031 is an equidigital number, since it uses as much as digits as its factorization.

20313033031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472396160.

The product of its (nonzero) digits is 486, while the sum is 19.

Adding to 20313033031 its reverse (13033031302), we get a palindrome (33346064333).

The spelling of 20313033031 in words is "twenty billion, three hundred thirteen million, thirty-three thousand, thirty-one".