20543421003 has 8 divisors (see below), whose sum is σ = 31304260608. Its totient is φ = 11739097704.

The previous prime is 20543420981. The next prime is 20543421007. The reversal of 20543421003 is 30012434502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20543421003 - 2⁵ = 20543420971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20543421007) 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 7 ways as a sum of consecutive naturals, for example, 489129051 + ... + 489129092.

It is an arithmetic number, because the mean of its divisors is an integer number (3913032576).

Almost surely, 2^20543421003 is an apocalyptic number.

20543421003 is a deficient number, since it is larger than the sum of its proper divisors (10760839605).

20543421003 is an equidigital number, since it uses as much as digits as its factorization.

20543421003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978258153.

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 20543421003 its reverse (30012434502), we get a palindrome (50555855505).

The spelling of 20543421003 in words is "twenty billion, five hundred forty-three million, four hundred twenty-one thousand, three".