20860684218 has 32 divisors (see below), whose sum is σ = 50571357120. Its totient is φ = 6321419280.

The previous prime is 20860684217. The next prime is 20860684253. The reversal of 20860684218 is 81248606802.

20860684218 is a `hidden beast` number, since 20 + 8 + 606 + 8 + 4 + 2 + 18 = 666.

It is a super-2 number, since 2×20860684218² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20860684217) 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, 17558905 + ... + 17560092.

It is an arithmetic number, because the mean of its divisors is an integer number (1580354910).

Almost surely, 2^20860684218 is an apocalyptic number.

20860684218 is an abundant number, since it is smaller than the sum of its proper divisors (29710672902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20860684218 is a wasteful number, since it uses less digits than its factorization.

20860684218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35119019 (or 35119013 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 45.

It can be divided in two parts, 20860 and 684218, that added together give a triangular number (705078 = T₁₁₈₇).

The spelling of 20860684218 in words is "twenty billion, eight hundred sixty million, six hundred eighty-four thousand, two hundred eighteen".