20049701517 has 12 divisors (see below), whose sum is σ = 29002600224. Its totient is φ = 13347119880.

The previous prime is 20049701509. The next prime is 20049701521. The reversal of 20049701517 is 71510794002.

It is a happy number.

It is not a de Polignac number, because 20049701517 - 2³ = 20049701509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20049701557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1605753 + ... + 1618190.

It is an arithmetic number, because the mean of its divisors is an integer number (2416883352).

Almost surely, 2^20049701517 is an apocalyptic number.

It is an amenable number.

20049701517 is a deficient number, since it is larger than the sum of its proper divisors (8952898707).

20049701517 is a wasteful number, since it uses less digits than its factorization.

20049701517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3224640 (or 3224637 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The spelling of 20049701517 in words is "twenty billion, forty-nine million, seven hundred one thousand, five hundred seventeen".