20786040 has 192 divisors, whose sum is σ = 76658400. Its totient is φ = 4838400.

The previous prime is 20786023. The next prime is 20786041. The reversal of 20786040 is 4068702.

It is a junction number, because it is equal to n+sod(n) for n = 20785995 and 20786013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20786041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 114750 + ... + 114930.

Almost surely, 2^20786040 is an apocalyptic number.

20786040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20786040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38329200).

20786040 is an abundant number, since it is smaller than the sum of its proper divisors (55872360).

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

20786040 is a wasteful number, since it uses less digits than its factorization.

20786040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 20786040 is about 4559.1709772721. The cubic root of 20786040 is about 274.9522341281.

It can be divided in two parts, 2078 and 6040, that added together give a palindrome (8118).

The spelling of 20786040 in words is "twenty million, seven hundred eighty-six thousand, forty".