20354071504503 has 16 divisors (see below), whose sum is σ = 29699316279936. Its totient is φ = 12296886707040.

The previous prime is 20354071504493. The next prime is 20354071504517. The reversal of 20354071504503 is 30540517045302.

It is not a de Polignac number, because 20354071504503 - 2⁵ = 20354071504471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20354071504703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 972844501 + ... + 972865422.

It is an arithmetic number, because the mean of its divisors is an integer number (1856207267496).

Almost surely, 2^{20354071504503} is an apocalyptic number.

20354071504503 is a deficient number, since it is larger than the sum of its proper divisors (9345244775433).

20354071504503 is a wasteful number, since it uses less digits than its factorization.

20354071504503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945710254.

The product of its (nonzero) digits is 252000, while the sum is 39.

Adding to 20354071504503 its reverse (30540517045302), we get a palindrome (50894588549805).

The spelling of 20354071504503 in words is "twenty trillion, three hundred fifty-four billion, seventy-one million, five hundred four thousand, five hundred three".