20010011023 has 4 divisors (see below), whose sum is σ = 20075190520. Its totient is φ = 19944831528.

The previous prime is 20010010961. The next prime is 20010011059. The reversal of 20010011023 is 32011001002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20010011023 - 2¹⁷ = 20009879951 is a prime.

It is a super-2 number, since 2×20010011023² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010011123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32589288 + ... + 32589901.

It is an arithmetic number, because the mean of its divisors is an integer number (5018797630).

Almost surely, 2^20010011023 is an apocalyptic number.

20010011023 is a deficient number, since it is larger than the sum of its proper divisors (65179497).

20010011023 is an equidigital number, since it uses as much as digits as its factorization.

20010011023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65179496.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 20010011023 its reverse (32011001002), we get a palindrome (52021012025).

The spelling of 20010011023 in words is "twenty billion, ten million, eleven thousand, twenty-three".