20762772887 has 4 divisors (see below), whose sum is σ = 20996062560. Its totient is φ = 20529483216.

The previous prime is 20762772859. The next prime is 20762772893. The reversal of 20762772887 is 78827726702.

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

It is a cyclic number.

It is not a de Polignac number, because 20762772887 - 2¹⁴ = 20762756503 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 (20762772487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116644703 + ... + 116644880.

It is an arithmetic number, because the mean of its divisors is an integer number (5249015640).

Almost surely, 2^20762772887 is an apocalyptic number.

20762772887 is a deficient number, since it is larger than the sum of its proper divisors (233289673).

20762772887 is an equidigital number, since it uses as much as digits as its factorization.

20762772887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233289672.

The product of its (nonzero) digits is 7375872, while the sum is 56.

The spelling of 20762772887 in words is "twenty billion, seven hundred sixty-two million, seven hundred seventy-two thousand, eight hundred eighty-seven".