20087755 has 4 divisors (see below), whose sum is σ = 24105312. Its totient is φ = 16070200.

The previous prime is 20087741. The next prime is 20087773. The reversal of 20087755 is 55778002.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20087755 - 2⁵ = 20087723 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20087755.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2008771 + ... + 2008780.

It is an arithmetic number, because the mean of its divisors is an integer number (6026328).

Almost surely, 2^20087755 is an apocalyptic number.

20087755 is a deficient number, since it is larger than the sum of its proper divisors (4017557).

20087755 is an equidigital number, since it uses as much as digits as its factorization.

20087755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4017556.

The product of its (nonzero) digits is 19600, while the sum is 34.

The square root of 20087755 is about 4481.9365234238. The cubic root of 20087755 is about 271.8381886127.

The spelling of 20087755 in words is "twenty million, eighty-seven thousand, seven hundred fifty-five".