20122553123 has 4 divisors (see below), whose sum is σ = 20156834040. Its totient is φ = 20088272208.

The previous prime is 20122553107. The next prime is 20122553141. The reversal of 20122553123 is 32135522102.

It is a happy number.

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 20122553123 - 2⁴ = 20122553107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20122553092 and 20122553101.

It is not an unprimeable number, because it can be changed into a prime (20122553153) 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 3 ways as a sum of consecutive naturals, for example, 17139578 + ... + 17140751.

It is an arithmetic number, because the mean of its divisors is an integer number (5039208510).

Almost surely, 2^20122553123 is an apocalyptic number.

20122553123 is a deficient number, since it is larger than the sum of its proper divisors (34280917).

20122553123 is an equidigital number, since it uses as much as digits as its factorization.

20122553123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34280916.

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 20122553123 in words is "twenty billion, one hundred twenty-two million, five hundred fifty-three thousand, one hundred twenty-three".