20312031302 has 4 divisors (see below), whose sum is σ = 30468046956. Its totient is φ = 10156015650.

The previous prime is 20312031287. The next prime is 20312031343. The reversal of 20312031302 is 20313021302.

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

It is a super-2 number, since 2×20312031302² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5078007824 + ... + 5078007827.

It is an arithmetic number, because the mean of its divisors is an integer number (7617011739).

Almost surely, 2^20312031302 is an apocalyptic number.

20312031302 is a deficient number, since it is larger than the sum of its proper divisors (10156015654).

20312031302 is a wasteful number, since it uses less digits than its factorization.

20312031302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10156015653.

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

Adding to 20312031302 its reverse (20313021302), we get a palindrome (40625052604).

The spelling of 20312031302 in words is "twenty billion, three hundred twelve million, thirty-one thousand, three hundred two".