20101223423 has 8 divisors (see below), whose sum is σ = 20241997776. Its totient is φ = 19960776000.

The previous prime is 20101223411. The next prime is 20101223437. The reversal of 20101223423 is 32432210102.

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

It is a cyclic number.

It is not a de Polignac number, because 20101223423 - 2⁸ = 20101223167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20101223395 and 20101223404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101226423) 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, 42323 + ... + 204923.

It is an arithmetic number, because the mean of its divisors is an integer number (2530249722).

Almost surely, 2^20101223423 is an apocalyptic number.

20101223423 is a deficient number, since it is larger than the sum of its proper divisors (140774353).

20101223423 is a wasteful number, since it uses less digits than its factorization.

20101223423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163465.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20101223423 its reverse (32432210102), we get a palindrome (52533433525).

The spelling of 20101223423 in words is "twenty billion, one hundred one million, two hundred twenty-three thousand, four hundred twenty-three".