20749805799 has 8 divisors (see below), whose sum is σ = 27776633472. Its totient is φ = 13778091000.

The previous prime is 20749805761. The next prime is 20749805801. The reversal of 20749805799 is 99750894702.

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

It is not a de Polignac number, because 20749805799 - 2⁸ = 20749805543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20749805099) 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, 13777339 + ... + 13778844.

It is an arithmetic number, because the mean of its divisors is an integer number (3472079184).

Almost surely, 2^20749805799 is an apocalyptic number.

20749805799 is a deficient number, since it is larger than the sum of its proper divisors (7026827673).

20749805799 is a wasteful number, since it uses less digits than its factorization.

20749805799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27556437.

The product of its (nonzero) digits is 11430720, while the sum is 60.

The spelling of 20749805799 in words is "twenty billion, seven hundred forty-nine million, eight hundred five thousand, seven hundred ninety-nine".