20389105 has 24 divisors (see below), whose sum is σ = 27349056. Its totient is φ = 14578080.

The previous prime is 20389097. The next prime is 20389111. The reversal of 20389105 is 50198302.

It is not a de Polignac number, because 20389105 - 2³ = 20389097 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40284 + ... + 40786.

It is an arithmetic number, because the mean of its divisors is an integer number (1139544).

Almost surely, 2^20389105 is an apocalyptic number.

It is an amenable number.

20389105 is a deficient number, since it is larger than the sum of its proper divisors (6959951).

20389105 is a wasteful number, since it uses less digits than its factorization.

20389105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597 (or 586 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 20389105 is about 4515.4296584046. The cubic root of 20389105 is about 273.1907900762.

The spelling of 20389105 in words is "twenty million, three hundred eighty-nine thousand, one hundred five".