20793877387 has 4 divisors (see below), whose sum is σ = 20794686480. Its totient is φ = 20793068296.

The previous prime is 20793877339. The next prime is 20793877417. The reversal of 20793877387 is 78377839702.

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 20793877387 - 2¹⁵ = 20793844619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20793877327) 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, 364687 + ... + 417832.

It is an arithmetic number, because the mean of its divisors is an integer number (5198671620).

Almost surely, 2^20793877387 is an apocalyptic number.

20793877387 is a deficient number, since it is larger than the sum of its proper divisors (809093).

20793877387 is an equidigital number, since it uses as much as digits as its factorization.

20793877387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809092.

The product of its (nonzero) digits is 24893568, while the sum is 61.

The spelling of 20793877387 in words is "twenty billion, seven hundred ninety-three million, eight hundred seventy-seven thousand, three hundred eighty-seven".