20618363907 has 6 divisors (see below), whose sum is σ = 29782081212. Its totient is φ = 13745575932.

The previous prime is 20618363897. The next prime is 20618363911. The reversal of 20618363907 is 70936381602.

20618363907 is a `hidden beast` number, since 2 + 0 + 6 + 1 + 8 + 3 + 639 + 0 + 7 = 666.

It is not a de Polignac number, because 20618363907 - 2⁴ = 20618363891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20618363947) 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, 1145464653 + ... + 1145464670.

It is an arithmetic number, because the mean of its divisors is an integer number (4963680202).

Almost surely, 2^20618363907 is an apocalyptic number.

20618363907 is a deficient number, since it is larger than the sum of its proper divisors (9163717305).

20618363907 is a wasteful number, since it uses less digits than its factorization.

20618363907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2290929329 (or 2290929326 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 20618363907 in words is "twenty billion, six hundred eighteen million, three hundred sixty-three thousand, nine hundred seven".