20413502443345 has 16 divisors (see below), whose sum is σ = 26734373019648. Its totient is φ = 14839937735040.

The previous prime is 20413502443333. The next prime is 20413502443423. The reversal of 20413502443345 is 54334420531402.

It is a de Polignac number, because none of the positive numbers 2^k-20413502443345 is a prime.

It is a super-2 number, since 2×20413502443345² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20413502443298 and 20413502443307.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 77941329 + ... + 78202798.

It is an arithmetic number, because the mean of its divisors is an integer number (1670898313728).

Almost surely, 2^{20413502443345} is an apocalyptic number.

It is an amenable number.

20413502443345 is a deficient number, since it is larger than the sum of its proper divisors (6320870576303).

20413502443345 is a wasteful number, since it uses less digits than its factorization.

20413502443345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156146520.

The product of its (nonzero) digits is 691200, while the sum is 40.

Adding to 20413502443345 its reverse (54334420531402), we get a palindrome (74747922974747).

The spelling of 20413502443345 in words is "twenty trillion, four hundred thirteen billion, five hundred two million, four hundred forty-three thousand, three hundred forty-five".