20158673245 has 8 divisors (see below), whose sum is σ = 24193734840. Its totient is φ = 16124720640.

The previous prime is 20158673239. The next prime is 20158673261. The reversal of 20158673245 is 54237685102.

It can be written as a sum of positive squares in 4 ways, for example, as 7148533401 + 13010139844 = 84549^2 + 114062^2 .

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

It is not a de Polignac number, because 20158673245 - 2⁹ = 20158672733 is a prime.

It is a congruent 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, 236716 + ... + 310405.

It is an arithmetic number, because the mean of its divisors is an integer number (3024216855).

Almost surely, 2^20158673245 is an apocalyptic number.

It is an amenable number.

20158673245 is a deficient number, since it is larger than the sum of its proper divisors (4035061595).

20158673245 is an equidigital number, since it uses as much as digits as its factorization.

20158673245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554495.

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 20158673245 in words is "twenty billion, one hundred fifty-eight million, six hundred seventy-three thousand, two hundred forty-five".