20160072521 has 8 divisors (see below), whose sum is σ = 20443436544. Its totient is φ = 19876903200.

The previous prime is 20160072497. The next prime is 20160072529. The reversal of 20160072521 is 12527006102.

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 20160072521 - 2³⁴ = 2980203337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20160072529) 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, 166496 + ... + 260846.

It is an arithmetic number, because the mean of its divisors is an integer number (2555429568).

Almost surely, 2^20160072521 is an apocalyptic number.

It is an amenable number.

20160072521 is a deficient number, since it is larger than the sum of its proper divisors (283364023).

20160072521 is an equidigital number, since it uses as much as digits as its factorization.

20160072521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97351.

The product of its (nonzero) digits is 1680, while the sum is 26.

Adding to 20160072521 its reverse (12527006102), we get a palindrome (32687078623).

The spelling of 20160072521 in words is "twenty billion, one hundred sixty million, seventy-two thousand, five hundred twenty-one".