20431454405101 has 2 divisors, whose sum is σ = 20431454405102. Its totient is φ = 20431454405100.

The previous prime is 20431454405083. The next prime is 20431454405137. The reversal of 20431454405101 is 10150445413402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18504149706025 + 1927304699076 = 4301645^2 + 1388274^2 .

It is a cyclic number.

It is not a de Polignac number, because 20431454405101 - 2⁵ = 20431454405069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20431454405801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10215727202550 + 10215727202551.

It is an arithmetic number, because the mean of its divisors is an integer number (10215727202551).

Almost surely, 2^{20431454405101} is an apocalyptic number.

It is an amenable number.

20431454405101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20431454405101 is an equidigital number, since it uses as much as digits as its factorization.

20431454405101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 20431454405101 its reverse (10150445413402), we get a palindrome (30581899818503).

The spelling of 20431454405101 in words is "twenty trillion, four hundred thirty-one billion, four hundred fifty-four million, four hundred five thousand, one hundred one".