20814378 has 32 divisors (see below), whose sum is σ = 45124800. Its totient is φ = 6400368.

The previous prime is 20814377. The next prime is 20814397. The reversal of 20814378 is 87341802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20814371) 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 15 ways as a sum of consecutive naturals, for example, 12393 + ... + 13971.

It is an arithmetic number, because the mean of its divisors is an integer number (1410150).

Almost surely, 2^20814378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20814378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22562400).

20814378 is an abundant number, since it is smaller than the sum of its proper divisors (24310422).

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

20814378 is a wasteful number, since it uses less digits than its factorization.

20814378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623 (or 1597 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 20814378 is about 4562.2777206128. The cubic root of 20814378 is about 275.0771265764.

The spelling of 20814378 in words is "twenty million, eight hundred fourteen thousand, three hundred seventy-eight".