20758878 has 48 divisors (see below), whose sum is σ = 52191360. Its totient is φ = 5840208.

The previous prime is 20758877. The next prime is 20758879. The reversal of 20758878 is 87885702.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20758877) and next prime (20758879).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20758877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7213 + ... + 9671.

It is an arithmetic number, because the mean of its divisors is an integer number (1087320).

Almost surely, 2^20758878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20758878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26095680).

20758878 is an abundant number, since it is smaller than the sum of its proper divisors (31432482).

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

20758878 is a wasteful number, since it uses less digits than its factorization.

20758878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2541 (or 2538 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The square root of 20758878 is about 4556.1911724597. The cubic root of 20758878 is about 274.8324180083.

The spelling of 20758878 in words is "twenty million, seven hundred fifty-eight thousand, eight hundred seventy-eight".