20345444331 has 8 divisors (see below), whose sum is σ = 28722980304. Its totient is φ = 12765768960.

The previous prime is 20345444311. The next prime is 20345444387. The reversal of 20345444331 is 13344454302.

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

It is not a de Polignac number, because 20345444331 - 2⁹ = 20345443819 is a prime.

It is a super-2 number, since 2×20345444331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20345444292 and 20345444301.

It is not an unprimeable number, because it can be changed into a prime (20345444311) 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 7 ways as a sum of consecutive naturals, for example, 199465090 + ... + 199465191.

It is an arithmetic number, because the mean of its divisors is an integer number (3590372538).

Almost surely, 2^20345444331 is an apocalyptic number.

20345444331 is a deficient number, since it is larger than the sum of its proper divisors (8377535973).

20345444331 is a wasteful number, since it uses less digits than its factorization.

20345444331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398930301.

The product of its (nonzero) digits is 69120, while the sum is 33.

Adding to 20345444331 its reverse (13344454302), we get a palindrome (33689898633).

The spelling of 20345444331 in words is "twenty billion, three hundred forty-five million, four hundred forty-four thousand, three hundred thirty-one".