20345211465431 has 4 divisors (see below), whose sum is σ = 20631763739664. Its totient is φ = 20058659191200.

The previous prime is 20345211465361. The next prime is 20345211465521. The reversal of 20345211465431 is 13456411254302.

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

It is a cyclic number.

It is not a de Polignac number, because 20345211465431 - 2¹⁰ = 20345211464407 is a prime.

It is a super-2 number, since 2×20345211465431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20345211465031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143276137010 + ... + 143276137151.

It is an arithmetic number, because the mean of its divisors is an integer number (5157940934916).

Almost surely, 2^{20345211465431} is an apocalyptic number.

20345211465431 is a deficient number, since it is larger than the sum of its proper divisors (286552274233).

20345211465431 is an equidigital number, since it uses as much as digits as its factorization.

20345211465431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286552274232.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 20345211465431 in words is "twenty trillion, three hundred forty-five billion, two hundred eleven million, four hundred sixty-five thousand, four hundred thirty-one".