20394912 has 24 divisors (see below), whose sum is σ = 53536896. Its totient is φ = 6798272.

The previous prime is 20394863. The next prime is 20394937. The reversal of 20394912 is 21949302.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20394912.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106128 + ... + 106319.

It is an arithmetic number, because the mean of its divisors is an integer number (2230704).

Almost surely, 2^20394912 is an apocalyptic number.

It is an amenable number.

20394912 is an abundant number, since it is smaller than the sum of its proper divisors (33141984).

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

20394912 is a wasteful number, since it uses less digits than its factorization.

20394912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212460 (or 212452 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 20394912 is about 4516.0726300625. The cubic root of 20394912 is about 273.2167233435.

The spelling of 20394912 in words is "twenty million, three hundred ninety-four thousand, nine hundred twelve".