20123401235 has 8 divisors (see below), whose sum is σ = 27597807456. Its totient is φ = 13798903680.

The previous prime is 20123401219. The next prime is 20123401253. The reversal of 20123401235 is 53210432102.

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

It is not a de Polignac number, because 20123401235 - 2⁴ = 20123401219 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 20123401235.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 287477126 + ... + 287477195.

It is an arithmetic number, because the mean of its divisors is an integer number (3449725932).

Almost surely, 2^20123401235 is an apocalyptic number.

20123401235 is a deficient number, since it is larger than the sum of its proper divisors (7474406221).

20123401235 is an equidigital number, since it uses as much as digits as its factorization.

20123401235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574954333.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 20123401235 its reverse (53210432102), we get a palindrome (73333833337).

The spelling of 20123401235 in words is "twenty billion, one hundred twenty-three million, four hundred one thousand, two hundred thirty-five".