20378934 has 36 divisors (see below), whose sum is σ = 45434844. Its totient is φ = 6601392.

The previous prime is 20378933. The next prime is 20378951. The reversal of 20378934 is 43987302.

20378934 = T₁₀₃₁ + T₁₀₃₂ + ... + T₁₀₆₇.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20378933) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 24229 + ... + 25055.

It is an arithmetic number, because the mean of its divisors is an integer number (1262079).

Almost surely, 2^20378934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20378934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22717422).

20378934 is an abundant number, since it is smaller than the sum of its proper divisors (25055910).

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

20378934 is a wasteful number, since it uses less digits than its factorization.

20378934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909 (or 869 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 20378934 is about 4514.3032685011. The cubic root of 20378934 is about 273.1453559143.

It can be divided in two parts, 20378 and 934, that added together give a palindrome (21312).

The spelling of 20378934 in words is "twenty million, three hundred seventy-eight thousand, nine hundred thirty-four".