20378834 has 16 divisors (see below), whose sum is σ = 35030400. Its totient is φ = 8709984.

The previous prime is 20378821. The next prime is 20378837. The reversal of 20378834 is 43887302.

It is a junction number, because it is equal to n+sod(n) for n = 20378794 and 20378803.

It is not an unprimeable number, because it can be changed into a prime (20378837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3947 + ... + 7505.

It is an arithmetic number, because the mean of its divisors is an integer number (2189400).

Almost surely, 2^20378834 is an apocalyptic number.

20378834 is a deficient number, since it is larger than the sum of its proper divisors (14651566).

20378834 is a wasteful number, since it uses less digits than its factorization.

20378834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 20378834 is about 4514.2921925812. The cubic root of 20378834 is about 273.1449091363.

It can be divided in two parts, 20378 and 834, that added together give a palindrome (21212).

The spelling of 20378834 in words is "twenty million, three hundred seventy-eight thousand, eight hundred thirty-four".