20012323031 has 2 divisors, whose sum is σ = 20012323032. Its totient is φ = 20012323030.

The previous prime is 20012323027. The next prime is 20012323043. The reversal of 20012323031 is 13032321002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20012323031 - 2² = 20012323027 is a prime.

It is a super-2 number, since 2×20012323031² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20012326031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006161515 + 10006161516.

It is an arithmetic number, because the mean of its divisors is an integer number (10006161516).

Almost surely, 2^20012323031 is an apocalyptic number.

20012323031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012323031 is an equidigital number, since it uses as much as digits as its factorization.

20012323031 is an evil number, because the sum of its binary digits is even.

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

Adding to 20012323031 its reverse (13032321002), we get a palindrome (33044644033).

The spelling of 20012323031 in words is "twenty billion, twelve million, three hundred twenty-three thousand, thirty-one".