20020010123 has 4 divisors (see below), whose sum is σ = 20020676280. Its totient is φ = 20019343968.

The previous prime is 20020010111. The next prime is 20020010141. The reversal of 20020010123 is 32101002002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32101002002 = 2 ⋅16050501001.

It is a cyclic number.

It is not a de Polignac number, because 20020010123 - 2²⁶ = 19952901259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20023010123) 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, 285758 + ... + 348851.

It is an arithmetic number, because the mean of its divisors is an integer number (5005169070).

Almost surely, 2^20020010123 is an apocalyptic number.

20020010123 is a deficient number, since it is larger than the sum of its proper divisors (666157).

20020010123 is an equidigital number, since it uses as much as digits as its factorization.

20020010123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666156.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20020010123 its reverse (32101002002), we get a palindrome (52121012125).

The spelling of 20020010123 in words is "twenty billion, twenty million, ten thousand, one hundred twenty-three".