20097769521 has 8 divisors (see below), whose sum is σ = 26917192960. Its totient is φ = 13338429552.

The previous prime is 20097769519. The next prime is 20097769561. The reversal of 20097769521 is 12596779002.

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

It is not a de Polignac number, because 20097769521 - 2¹ = 20097769519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20097769501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15020086 + ... + 15021423.

It is an arithmetic number, because the mean of its divisors is an integer number (3364649120).

Almost surely, 2^20097769521 is an apocalyptic number.

It is an amenable number.

20097769521 is a deficient number, since it is larger than the sum of its proper divisors (6819423439).

20097769521 is a wasteful number, since it uses less digits than its factorization.

20097769521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30041735.

The product of its (nonzero) digits is 476280, while the sum is 48.

The spelling of 20097769521 in words is "twenty billion, ninety-seven million, seven hundred sixty-nine thousand, five hundred twenty-one".