20187552797 has 8 divisors (see below), whose sum is σ = 20653852800. Its totient is φ = 19726521984.

The previous prime is 20187552793. The next prime is 20187552799. The reversal of 20187552797 is 79725578102.

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 20187552797 - 2² = 20187552793 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20187552793) 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, 1309547 + ... + 1324872.

It is an arithmetic number, because the mean of its divisors is an integer number (2581731600).

Almost surely, 2^20187552797 is an apocalyptic number.

It is an amenable number.

20187552797 is a deficient number, since it is larger than the sum of its proper divisors (466300003).

20187552797 is an equidigital number, since it uses as much as digits as its factorization.

20187552797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2634595.

The product of its (nonzero) digits is 2469600, while the sum is 53.

The spelling of 20187552797 in words is "twenty billion, one hundred eighty-seven million, five hundred fifty-two thousand, seven hundred ninety-seven".