20778024 has 16 divisors (see below), whose sum is σ = 51945120. Its totient is φ = 6926000.

The previous prime is 20778019. The next prime is 20778071. The reversal of 20778024 is 42087702.

It is a junction number, because it is equal to n+sod(n) for n = 20777982 and 20778000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432852 + ... + 432899.

It is an arithmetic number, because the mean of its divisors is an integer number (3246570).

Almost surely, 2^20778024 is an apocalyptic number.

20778024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20778024 is an abundant number, since it is smaller than the sum of its proper divisors (31167096).

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

20778024 is a wasteful number, since it uses less digits than its factorization.

20778024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865760 (or 865756 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 20778024 is about 4558.2917853073. The cubic root of 20778024 is about 274.9168850750.

It can be divided in two parts, 2077 and 8024, that added together give a palindrome (10101).

The spelling of 20778024 in words is "twenty million, seven hundred seventy-eight thousand, twenty-four".