20403454313445 has 96 divisors (see below), whose sum is σ = 39206955294720. Its totient is φ = 9024908618880.

The previous prime is 20403454313441. The next prime is 20403454313471. The reversal of 20403454313445 is 54431345430402.

It is not a de Polignac number, because 20403454313445 - 2² = 20403454313441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20403454313397 and 20403454313406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20403454313441) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 142630966 + ... + 142773944.

It is an arithmetic number, because the mean of its divisors is an integer number (408405784320).

Almost surely, 2^{20403454313445} is an apocalyptic number.

It is an amenable number.

20403454313445 is a deficient number, since it is larger than the sum of its proper divisors (18803500981275).

20403454313445 is a wasteful number, since it uses less digits than its factorization.

20403454313445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149295 (or 149288 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 42.

Adding to 20403454313445 its reverse (54431345430402), we get a palindrome (74834799743847).

The spelling of 20403454313445 in words is "twenty trillion, four hundred three billion, four hundred fifty-four million, three hundred thirteen thousand, four hundred forty-five".