20043355423 has 16 divisors (see below), whose sum is σ = 25519394880. Its totient is φ = 15311632896.

The previous prime is 20043355393. The next prime is 20043355439. The reversal of 20043355423 is 32455334002.

It is not a de Polignac number, because 20043355423 - 2¹³ = 20043347231 is a prime.

It is a super-2 number, since 2×20043355423² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043355463) 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 15 ways as a sum of consecutive naturals, for example, 3794890 + ... + 3800167.

It is an arithmetic number, because the mean of its divisors is an integer number (1594962180).

Almost surely, 2^20043355423 is an apocalyptic number.

20043355423 is a deficient number, since it is larger than the sum of its proper divisors (5476039457).

20043355423 is a wasteful number, since it uses less digits than its factorization.

20043355423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7595106.

The product of its (nonzero) digits is 43200, while the sum is 31.

Adding to 20043355423 its reverse (32455334002), we get a palindrome (52498689425).

The spelling of 20043355423 in words is "twenty billion, forty-three million, three hundred fifty-five thousand, four hundred twenty-three".