20394160 has 20 divisors (see below), whose sum is σ = 47416608. Its totient is φ = 8157632.

The previous prime is 20394151. The next prime is 20394161. The reversal of 20394160 is 6149302.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (20394161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127384 + ... + 127543.

Almost surely, 2^20394160 is an apocalyptic number.

20394160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20394160 is an abundant number, since it is smaller than the sum of its proper divisors (27022448).

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

20394160 is a wasteful number, since it uses less digits than its factorization.

20394160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254940 (or 254934 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20394160 is about 4515.9893711124. The cubic root of 20394160 is about 273.2133652919.

The spelling of 20394160 in words is "twenty million, three hundred ninety-four thousand, one hundred sixty".