20349928 has 16 divisors (see below), whose sum is σ = 38206080. Its totient is φ = 10161648.

The previous prime is 20349913. The next prime is 20349929. The reversal of 20349928 is 82994302.

It is not an unprimeable number, because it can be changed into a prime (20349929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8425 + ... + 10567.

It is an arithmetic number, because the mean of its divisors is an integer number (2387880).

Almost surely, 2^20349928 is an apocalyptic number.

It is an amenable number.

20349928 is a deficient number, since it is larger than the sum of its proper divisors (17856152).

20349928 is a wasteful number, since it uses less digits than its factorization.

20349928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336 (or 3332 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 20349928 is about 4511.0894471292. The cubic root of 20349928 is about 273.0157021565.

The spelling of 20349928 in words is "twenty million, three hundred forty-nine thousand, nine hundred twenty-eight".