20319725487 has 8 divisors (see below), whose sum is σ = 27096615936. Its totient is φ = 13544659352.

The previous prime is 20319725483. The next prime is 20319725509. The reversal of 20319725487 is 78452791302.

It is a happy number.

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 20319725487 - 2² = 20319725483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20319725483) 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, 429873 + ... + 474794.

It is an arithmetic number, because the mean of its divisors is an integer number (3387076992).

Almost surely, 2^20319725487 is an apocalyptic number.

20319725487 is a deficient number, since it is larger than the sum of its proper divisors (6776890449).

20319725487 is an equidigital number, since it uses as much as digits as its factorization.

20319725487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912157.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 20319725487 in words is "twenty billion, three hundred nineteen million, seven hundred twenty-five thousand, four hundred eighty-seven".