20354010005503 has 4 divisors (see below), whose sum is σ = 21238966962288. Its totient is φ = 19469053048720.

The previous prime is 20354010005387. The next prime is 20354010005509. The reversal of 20354010005503 is 30550001045302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20354010005503 - 2¹⁷ = 20354009874431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20354010005509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442478478358 + ... + 442478478403.

It is an arithmetic number, because the mean of its divisors is an integer number (5309741740572).

Almost surely, 2^{20354010005503} is an apocalyptic number.

20354010005503 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20354010005503 is a deficient number, since it is larger than the sum of its proper divisors (884956956785).

20354010005503 is an equidigital number, since it uses as much as digits as its factorization.

20354010005503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884956956784.

The product of its (nonzero) digits is 9000, while the sum is 28.

The spelling of 20354010005503 in words is "twenty trillion, three hundred fifty-four billion, ten million, five thousand, five hundred three".