20718420678414 has 96 divisors (see below), whose sum is σ = 47633227649280. Its totient is φ = 6485852272896.

The previous prime is 20718420678409. The next prime is 20718420678433. The reversal of 20718420678414 is 41487602481702.

It is a happy number.

20718420678414 is a `hidden beast` number, since 2 + 0 + 7 + 18 + 4 + 206 + 7 + 8 + 414 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1641836997 + ... + 1641849615.

It is an arithmetic number, because the mean of its divisors is an integer number (496179454680).

Almost surely, 2^{20718420678414} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20718420678414, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23816613824640).

20718420678414 is an abundant number, since it is smaller than the sum of its proper divisors (26914806970866).

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

20718420678414 is a wasteful number, since it uses less digits than its factorization.

20718420678414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23814 (or 23811 counting only the distinct ones).

The product of its (nonzero) digits is 4816896, while the sum is 54.

The spelling of 20718420678414 in words is "twenty trillion, seven hundred eighteen billion, four hundred twenty million, six hundred seventy-eight thousand, four hundred fourteen".