20724456315245 has 8 divisors (see below), whose sum is σ = 24869434248960. Its totient is φ = 16579507271760.

The previous prime is 20724456315223. The next prime is 20724456315287. The reversal of 20724456315245 is 54251365442702.

It is a happy number.

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

It is not a de Polignac number, because 20724456315245 - 2¹⁶ = 20724456249709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20724456315193 and 20724456315202.

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, 5611721 + ... + 8540510.

It is an arithmetic number, because the mean of its divisors is an integer number (3108679281120).

Almost surely, 2^{20724456315245} is an apocalyptic number.

It is an amenable number.

20724456315245 is a deficient number, since it is larger than the sum of its proper divisors (4144977933715).

20724456315245 is a wasteful number, since it uses less digits than its factorization.

20724456315245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14445115.

The product of its (nonzero) digits is 8064000, while the sum is 50.

The spelling of 20724456315245 in words is "twenty trillion, seven hundred twenty-four billion, four hundred fifty-six million, three hundred fifteen thousand, two hundred forty-five".