20313021031 has 2 divisors, whose sum is σ = 20313021032. Its totient is φ = 20313021030.

The previous prime is 20313020951. The next prime is 20313021083. The reversal of 20313021031 is 13012031302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20313021031 - 2¹¹ = 20313018983 is a prime.

It is a super-2 number, since 2×20313021031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20313020996 and 20313021014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20313021331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156510515 + 10156510516.

It is an arithmetic number, because the mean of its divisors is an integer number (10156510516).

Almost surely, 2^20313021031 is an apocalyptic number.

20313021031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20313021031 is an equidigital number, since it uses as much as digits as its factorization.

20313021031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20313021031 its reverse (13012031302), we get a palindrome (33325052333).

The spelling of 20313021031 in words is "twenty billion, three hundred thirteen million, twenty-one thousand, thirty-one".