20144552687 has 8 divisors (see below), whose sum is σ = 23057934336. Its totient is φ = 17240068152.

The previous prime is 20144552683. The next prime is 20144552699. The reversal of 20144552687 is 78625544102.

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 20144552687 - 2² = 20144552683 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 (20144552683) 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, 2219423 + ... + 2228480.

It is an arithmetic number, because the mean of its divisors is an integer number (2882241792).

Almost surely, 2^20144552687 is an apocalyptic number.

20144552687 is a deficient number, since it is larger than the sum of its proper divisors (2913381649).

20144552687 is an equidigital number, since it uses as much as digits as its factorization.

20144552687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4448557.

The product of its (nonzero) digits is 537600, while the sum is 44.

The spelling of 20144552687 in words is "twenty billion, one hundred forty-four million, five hundred fifty-two thousand, six hundred eighty-seven".