20423355031 has 2 divisors, whose sum is σ = 20423355032. Its totient is φ = 20423355030.

The previous prime is 20423355023. The next prime is 20423355047. The reversal of 20423355031 is 13055332402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20423355031 - 2³ = 20423355023 is a prime.

It is a super-2 number, since 2×20423355031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20423355431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211677515 + 10211677516.

It is an arithmetic number, because the mean of its divisors is an integer number (10211677516).

Almost surely, 2^20423355031 is an apocalyptic number.

20423355031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423355031 is an equidigital number, since it uses as much as digits as its factorization.

20423355031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 28.

Adding to 20423355031 its reverse (13055332402), we get a palindrome (33478687433).

The spelling of 20423355031 in words is "twenty billion, four hundred twenty-three million, three hundred fifty-five thousand, thirty-one".