20812901517344 has 12 divisors (see below), whose sum is σ = 40975399862334. Its totient is φ = 10406450758656.

The previous prime is 20812901517341. The next prime is 20812901517347. The reversal of 20812901517344 is 44371510921802.

It is an interprime number because it is at equal distance from previous prime (20812901517341) and next prime (20812901517347).

It can be written as a sum of positive squares in only one way, i.e., 17162891267344 + 3650010250000 = 4142812^2 + 1910500^2 .

It is not an unprimeable number, because it can be changed into a prime (20812901517341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325201586177 + ... + 325201586240.

Almost surely, 2^{20812901517344} is an apocalyptic number.

It is an amenable number.

20812901517344 is a deficient number, since it is larger than the sum of its proper divisors (20162498344990).

20812901517344 is an equidigital number, since it uses as much as digits as its factorization.

20812901517344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650403172427 (or 650403172419 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 20812901517344 in words is "twenty trillion, eight hundred twelve billion, nine hundred one million, five hundred seventeen thousand, three hundred forty-four".