20078109 has 12 divisors (see below), whose sum is σ = 29047200. Its totient is φ = 13364424.

The previous prime is 20078101. The next prime is 20078131. The reversal of 20078109 is 90187002.

It is not a de Polignac number, because 20078109 - 2³ = 20078101 is a prime.

It is a super-2 number, since 2×20078109² = 806260922031762, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20078101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6222 + ... + 8880.

It is an arithmetic number, because the mean of its divisors is an integer number (2420600).

Almost surely, 2^20078109 is an apocalyptic number.

It is an amenable number.

20078109 is a deficient number, since it is larger than the sum of its proper divisors (8969091).

20078109 is a wasteful number, since it uses less digits than its factorization.

20078109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3504 (or 3501 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 20078109 is about 4480.8602968626. The cubic root of 20078109 is about 271.7946700448.

The spelling of 20078109 in words is "twenty million, seventy-eight thousand, one hundred nine".