20049794501 has 6 divisors (see below), whose sum is σ = 22038204006. Its totient is φ = 18227085800.

The previous prime is 20049794447. The next prime is 20049794503. The reversal of 20049794501 is 10549794002.

It can be written as a sum of positive squares in only one way, i.e., 17108901601 + 2940892900 = 130801^2 + 54230^2 .

It is not a de Polignac number, because 20049794501 - 2¹⁴ = 20049778117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20049794503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 82850270 + ... + 82850511.

It is an arithmetic number, because the mean of its divisors is an integer number (3673034001).

Almost surely, 2^20049794501 is an apocalyptic number.

It is an amenable number.

20049794501 is a deficient number, since it is larger than the sum of its proper divisors (1988409505).

20049794501 is a wasteful number, since it uses less digits than its factorization.

20049794501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165700803 (or 165700792 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 20049794501 in words is "twenty billion, forty-nine million, seven hundred ninety-four thousand, five hundred one".