20358440718 has 96 divisors (see below), whose sum is σ = 51739948800. Its totient is φ = 5280791040.

The previous prime is 20358440659. The next prime is 20358440737. The reversal of 20358440718 is 81704485302.

It is a super-2 number, since 2×20358440718² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20358440718.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2657758 + ... + 2665406.

It is an arithmetic number, because the mean of its divisors is an integer number (538957800).

Almost surely, 2^20358440718 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20358440718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25869974400).

20358440718 is an abundant number, since it is smaller than the sum of its proper divisors (31381508082).

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

20358440718 is a wasteful number, since it uses less digits than its factorization.

20358440718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8502 (or 8495 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The spelling of 20358440718 in words is "twenty billion, three hundred fifty-eight million, four hundred forty thousand, seven hundred eighteen".