20345305031 has 8 divisors (see below), whose sum is σ = 20593412784. Its totient is φ = 20097268480.

The previous prime is 20345305003. The next prime is 20345305087. The reversal of 20345305031 is 13050354302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20345305031 - 2²⁶ = 20278196167 is a prime.

It is a super-2 number, since 2×20345305031² (a number of 21 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 (20345305831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 765221 + ... + 791361.

It is an arithmetic number, because the mean of its divisors is an integer number (2574176598).

Almost surely, 2^20345305031 is an apocalyptic number.

20345305031 is a deficient number, since it is larger than the sum of its proper divisors (248107753).

20345305031 is an equidigital number, since it uses as much as digits as its factorization.

20345305031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35601.

The product of its (nonzero) digits is 5400, while the sum is 26.

Adding to 20345305031 its reverse (13050354302), we get a palindrome (33395659333).

The spelling of 20345305031 in words is "twenty billion, three hundred forty-five million, three hundred five thousand, thirty-one".