20509094 has 8 divisors (see below), whose sum is σ = 32382840. Its totient is φ = 9714816.

The previous prime is 20509081. The next prime is 20509109. The reversal of 20509094 is 49090502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 269819 + ... + 269894.

It is an arithmetic number, because the mean of its divisors is an integer number (4047855).

Almost surely, 2^20509094 is an apocalyptic number.

20509094 is a deficient number, since it is larger than the sum of its proper divisors (11873746).

20509094 is a wasteful number, since it uses less digits than its factorization.

20509094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539734.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 20509094 is about 4528.6967220162. The cubic root of 20509094 is about 273.7256475630.

Adding to 20509094 its reverse (49090502), we get a palindrome (69599596).

The spelling of 20509094 in words is "twenty million, five hundred nine thousand, ninety-four".