20111243023 has 8 divisors (see below), whose sum is σ = 20192674320. Its totient is φ = 20029941120.

The previous prime is 20111243021. The next prime is 20111243099. The reversal of 20111243023 is 32034211102.

It is a happy number.

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 20111243023 - 2¹ = 20111243021 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 (20111243021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285408 + ... + 348826.

It is an arithmetic number, because the mean of its divisors is an integer number (2524084290).

Almost surely, 2^20111243023 is an apocalyptic number.

20111243023 is a deficient number, since it is larger than the sum of its proper divisors (81431297).

20111243023 is an equidigital number, since it uses as much as digits as its factorization.

20111243023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64697.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20111243023 its reverse (32034211102), we get a palindrome (52145454125).

The spelling of 20111243023 in words is "twenty billion, one hundred eleven million, two hundred forty-three thousand, twenty-three".