20018518367 has 16 divisors (see below), whose sum is σ = 21068844288. Its totient is φ = 18996560640.

The previous prime is 20018518361. The next prime is 20018518391. The reversal of 20018518367 is 76381581002.

It is a cyclic number.

It is not a de Polignac number, because 20018518367 - 2¹⁴ = 20018501983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20018518361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365933 + ... + 417065.

It is an arithmetic number, because the mean of its divisors is an integer number (1316802768).

Almost surely, 2^20018518367 is an apocalyptic number.

20018518367 is a deficient number, since it is larger than the sum of its proper divisors (1050325921).

20018518367 is a wasteful number, since it uses less digits than its factorization.

20018518367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51410.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 20018518367 in words is "twenty billion, eighteen million, five hundred eighteen thousand, three hundred sixty-seven".