1020203423 has 16 divisors (see below), whose sum is σ = 1105104000. Its totient is φ = 938679840.

The previous prime is 1020203411. The next prime is 1020203453. The reversal of 1020203423 is 3243020201.

It is a cyclic number.

It is not a de Polignac number, because 1020203423 - 2¹⁰ = 1020202399 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 (1020203453) 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, 144428 + ... + 151326.

It is an arithmetic number, because the mean of its divisors is an integer number (69069000).

Almost surely, 2^1020203423 is an apocalyptic number.

1020203423 is a deficient number, since it is larger than the sum of its proper divisors (84900577).

1020203423 is a wasteful number, since it uses less digits than its factorization.

1020203423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7142.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 1020203423 is about 31940.6233971724. The cubic root of 1020203423 is about 1006.6896234818.

Adding to 1020203423 its reverse (3243020201), we get a palindrome (4263223624).

The spelling of 1020203423 in words is "one billion, twenty million, two hundred three thousand, four hundred twenty-three".