20123535403 has 8 divisors (see below), whose sum is σ = 20480710976. Its totient is φ = 19767240000.

The previous prime is 20123535373. The next prime is 20123535407. The reversal of 20123535403 is 30453532102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20123535403 - 2⁹ = 20123534891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123535407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173826 + ... + 265447.

It is an arithmetic number, because the mean of its divisors is an integer number (2560088872).

Almost surely, 2^20123535403 is an apocalyptic number.

20123535403 is a deficient number, since it is larger than the sum of its proper divisors (357175573).

20123535403 is an equidigital number, since it uses as much as digits as its factorization.

20123535403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440085.

The product of its (nonzero) digits is 10800, while the sum is 28.

The spelling of 20123535403 in words is "twenty billion, one hundred twenty-three million, five hundred thirty-five thousand, four hundred three".