20425515730 has 8 divisors (see below), whose sum is σ = 36765928332. Its totient is φ = 8170206288.

The previous prime is 20425515703. The next prime is 20425515739. The reversal of 20425515730 is 3751552402.

It can be written as a sum of positive squares in 2 ways, for example, as 20173373089 + 252142641 = 142033^2 + 15879^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20425515739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1021275777 + ... + 1021275796.

Almost surely, 2^20425515730 is an apocalyptic number.

20425515730 is a deficient number, since it is larger than the sum of its proper divisors (16340412602).

20425515730 is a wasteful number, since it uses less digits than its factorization.

20425515730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042551580.

The product of its (nonzero) digits is 42000, while the sum is 34.

The spelling of 20425515730 in words is "twenty billion, four hundred twenty-five million, five hundred fifteen thousand, seven hundred thirty".