20345031433445 has 8 divisors (see below), whose sum is σ = 24414109885080. Its totient is φ = 16275977036800.

The previous prime is 20345031433417. The next prime is 20345031433499. The reversal of 20345031433445 is 54433413054302.

It can be written as a sum of positive squares in 4 ways, for example, as 2596951588036 + 17748079845409 = 1611506^2 + 4212847^2 .

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

It is not a de Polignac number, because 20345031433445 - 2⁶ = 20345031433381 is a prime.

It is a super-2 number, since 2×20345031433445² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4097540 + ... + 7581549.

It is an arithmetic number, because the mean of its divisors is an integer number (3051763735635).

Almost surely, 2^{20345031433445} is an apocalyptic number.

It is an amenable number.

20345031433445 is a deficient number, since it is larger than the sum of its proper divisors (4069078451635).

20345031433445 is a wasteful number, since it uses less digits than its factorization.

20345031433445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12027495.

The product of its (nonzero) digits is 1036800, while the sum is 41.

Adding to 20345031433445 its reverse (54433413054302), we get a palindrome (74778444487747).

The spelling of 20345031433445 in words is "twenty trillion, three hundred forty-five billion, thirty-one million, four hundred thirty-three thousand, four hundred forty-five".