20354720203 has 4 divisors (see below), whose sum is σ = 20355112120. Its totient is φ = 20354328288.

The previous prime is 20354720179. The next prime is 20354720207. The reversal of 20354720203 is 30202745302.

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 20354720203 - 2¹⁷ = 20354589131 is a prime.

It is a super-2 number, since 2×20354720203² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20354720207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103518 + ... + 226771.

It is an arithmetic number, because the mean of its divisors is an integer number (5088778030).

Almost surely, 2^20354720203 is an apocalyptic number.

20354720203 is a deficient number, since it is larger than the sum of its proper divisors (391917).

20354720203 is an equidigital number, since it uses as much as digits as its factorization.

20354720203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391916.

The product of its (nonzero) digits is 10080, while the sum is 28.

The spelling of 20354720203 in words is "twenty billion, three hundred fifty-four million, seven hundred twenty thousand, two hundred three".