23490173745 has 20 divisors (see below), whose sum is σ = 42108312180. Its totient is φ = 12528092448.

The previous prime is 23490173743. The next prime is 23490173761. The reversal of 23490173745 is 54737109432.

23490173745 is a `hidden beast` number, since 23 + 490 + 1 + 73 + 74 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4687182369 + 18802991376 = 68463^2 + 137124^2 .

It is not a de Polignac number, because 23490173745 - 2¹ = 23490173743 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

23490173745 is a modest number, since divided by 173745 gives 23490 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 23490173745.

It is not an unprimeable number, because it can be changed into a prime (23490173743) 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 19 ways as a sum of consecutive naturals, for example, 28999810 + ... + 29000619.

It is an arithmetic number, because the mean of its divisors is an integer number (2105415609).

Almost surely, 2^23490173745 is an apocalyptic number.

It is an amenable number.

23490173745 is a deficient number, since it is larger than the sum of its proper divisors (18618138435).

23490173745 is an equidigital number, since it uses as much as digits as its factorization.

23490173745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58000446 (or 58000437 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The spelling of 23490173745 in words is "twenty-three billion, four hundred ninety million, one hundred seventy-three thousand, seven hundred forty-five".