20394380 has 24 divisors (see below), whose sum is σ = 42919632. Its totient is φ = 8140352.

The previous prime is 20394379. The next prime is 20394389. The reversal of 20394380 is 8349302.

It is not an unprimeable number, because it can be changed into a prime (20394389) 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, 12914 + ... + 14406.

It is an arithmetic number, because the mean of its divisors is an integer number (1788318).

Almost surely, 2^20394380 is an apocalyptic number.

20394380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20394380 is an abundant number, since it is smaller than the sum of its proper divisors (22525252).

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

20394380 is a wasteful number, since it uses less digits than its factorization.

20394380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185 (or 2183 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20394380 is about 4516.0137289428. The cubic root of 20394380 is about 273.2143477091.

The spelling of 20394380 in words is "twenty million, three hundred ninety-four thousand, three hundred eighty".