20888248791 has 8 divisors (see below), whose sum is σ = 27925667440. Its totient is φ = 13888164672.

The previous prime is 20888248763. The next prime is 20888248807. The reversal of 20888248791 is 19784288802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20888248791 - 2¹⁹ = 20887724503 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 (20888248741) 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, 9332326 + ... + 9334563.

It is an arithmetic number, because the mean of its divisors is an integer number (3490708430).

Almost surely, 2^20888248791 is an apocalyptic number.

20888248791 is a deficient number, since it is larger than the sum of its proper divisors (7037418649).

20888248791 is a wasteful number, since it uses less digits than its factorization.

20888248791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18667265.

The product of its (nonzero) digits is 4128768, while the sum is 57.

The spelling of 20888248791 in words is "twenty billion, eight hundred eighty-eight million, two hundred forty-eight thousand, seven hundred ninety-one".