20210120023 has 4 divisors (see below), whose sum is σ = 20541433528. Its totient is φ = 19878806520.

The previous prime is 20210120009. The next prime is 20210120027. The reversal of 20210120023 is 32002101202.

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 20210120023 - 2⁹ = 20210119511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20210119985 and 20210120012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210120027) 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, 165656661 + ... + 165656782.

It is an arithmetic number, because the mean of its divisors is an integer number (5135358382).

Almost surely, 2^20210120023 is an apocalyptic number.

20210120023 is a deficient number, since it is larger than the sum of its proper divisors (331313505).

20210120023 is an equidigital number, since it uses as much as digits as its factorization.

20210120023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331313504.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20210120023 its reverse (32002101202), we get a palindrome (52212221225).

The spelling of 20210120023 in words is "twenty billion, two hundred ten million, one hundred twenty thousand, twenty-three".