20311020023 has 16 divisors (see below), whose sum is σ = 23773216320. Its totient is φ = 16993898496.

The previous prime is 20311019999. The next prime is 20311020031. The reversal of 20311020023 is 32002011302.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20311020023 - 2⁸ = 20311019767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311022023) 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, 155318 + ... + 254451.

It is an arithmetic number, because the mean of its divisors is an integer number (1485826020).

Almost surely, 2^20311020023 is an apocalyptic number.

20311020023 is a deficient number, since it is larger than the sum of its proper divisors (3462196297).

20311020023 is an equidigital number, since it uses as much as digits as its factorization.

20311020023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409946.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20311020023 its reverse (32002011302), we get a palindrome (52313031325).

The spelling of 20311020023 in words is "twenty billion, three hundred eleven million, twenty thousand, twenty-three".