20034378 has 112 divisors (see below), whose sum is σ = 55821696. Its totient is φ = 5248800.

The previous prime is 20034373. The next prime is 20034397. The reversal of 20034378 is 87343002.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20034373) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 132603 + ... + 132753.

It is an arithmetic number, because the mean of its divisors is an integer number (498408).

Almost surely, 2^20034378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20034378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27910848).

20034378 is an abundant number, since it is smaller than the sum of its proper divisors (35787318).

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

20034378 is a wasteful number, since it uses less digits than its factorization.

20034378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20034378 is about 4475.9778819829. The cubic root of 20034378 is about 271.5971997140.

The spelling of 20034378 in words is "twenty million, thirty-four thousand, three hundred seventy-eight".