20432145001505 has 8 divisors (see below), whose sum is σ = 24674743263912. Its totient is φ = 16241603159808.

The previous prime is 20432145001501. The next prime is 20432145001537. The reversal of 20432145001505 is 50510054123402.

It can be written as a sum of positive squares in 4 ways, for example, as 67792016161 + 20364352985344 = 260369^2 + 4512688^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20432145001505 - 2² = 20432145001501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20432145001501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13014104312 + ... + 13014105881.

It is an arithmetic number, because the mean of its divisors is an integer number (3084342907989).

Almost surely, 2^{20432145001505} is an apocalyptic number.

It is an amenable number.

20432145001505 is a deficient number, since it is larger than the sum of its proper divisors (4242598262407).

20432145001505 is a wasteful number, since it uses less digits than its factorization.

20432145001505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26028210355.

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 20432145001505 its reverse (50510054123402), we get a palindrome (70942199124907).

The spelling of 20432145001505 in words is "twenty trillion, four hundred thirty-two billion, one hundred forty-five million, one thousand, five hundred five".