20123475846785 has 8 divisors (see below), whose sum is σ = 24148377166056. Its totient is φ = 16098643244160.

The previous prime is 20123475846779. The next prime is 20123475846827. The reversal of 20123475846785 is 58764857432102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2090849484529 + 18032626362256 = 1445977^2 + 4246484^2 .

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

It is not a de Polignac number, because 20123475846785 - 2¹⁶ = 20123475781249 is a prime.

It is a super-2 number, since 2×20123475846785² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16532684 + ... + 17708093.

It is an arithmetic number, because the mean of its divisors is an integer number (3018547145757).

Almost surely, 2^{20123475846785} is an apocalyptic number.

It is an amenable number.

20123475846785 is a deficient number, since it is larger than the sum of its proper divisors (4024901319271).

20123475846785 is a wasteful number, since it uses less digits than its factorization.

20123475846785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34358323.

The product of its (nonzero) digits is 90316800, while the sum is 62.

The spelling of 20123475846785 in words is "twenty trillion, one hundred twenty-three billion, four hundred seventy-five million, eight hundred forty-six thousand, seven hundred eighty-five".