20717424207 has 12 divisors (see below), whose sum is σ = 29942803800. Its totient is φ = 13803476688.

The previous prime is 20717424199. The next prime is 20717424227. The reversal of 20717424207 is 70242471702.

It is a happy number.

20717424207 is a `hidden beast` number, since 20 + 7 + 1 + 7 + 424 + 207 = 666.

It is not a de Polignac number, because 20717424207 - 2³ = 20717424199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20717424227) 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, 662148 + ... + 692729.

It is an arithmetic number, because the mean of its divisors is an integer number (2495233650).

Almost surely, 2^20717424207 is an apocalyptic number.

20717424207 is a deficient number, since it is larger than the sum of its proper divisors (9225379593).

20717424207 is a wasteful number, since it uses less digits than its factorization.

20717424207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356582 (or 1356579 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 36.

Adding to 20717424207 its reverse (70242471702), we get a palindrome (90959895909).

The spelling of 20717424207 in words is "twenty billion, seven hundred seventeen million, four hundred twenty-four thousand, two hundred seven".