20535254123 has 4 divisors (see below), whose sum is σ = 20816559048. Its totient is φ = 20253949200.

The previous prime is 20535254111. The next prime is 20535254167. The reversal of 20535254123 is 32145253502.

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 20535254123 - 2⁸ = 20535253867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20535254123.

It is not an unprimeable number, because it can be changed into a prime (20535254723) 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, 140652353 + ... + 140652498.

It is an arithmetic number, because the mean of its divisors is an integer number (5204139762).

Almost surely, 2^20535254123 is an apocalyptic number.

20535254123 is a deficient number, since it is larger than the sum of its proper divisors (281304925).

20535254123 is an equidigital number, since it uses as much as digits as its factorization.

20535254123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281304924.

The product of its (nonzero) digits is 36000, while the sum is 32.

The spelling of 20535254123 in words is "twenty billion, five hundred thirty-five million, two hundred fifty-four thousand, one hundred twenty-three".