20009774 has 8 divisors (see below), whose sum is σ = 31594440. Its totient is φ = 9478296.

The previous prime is 20009761. The next prime is 20009813. The reversal of 20009774 is 47790002.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263249 + ... + 263324.

It is an arithmetic number, because the mean of its divisors is an integer number (3949305).

Almost surely, 2^20009774 is an apocalyptic number.

20009774 is a deficient number, since it is larger than the sum of its proper divisors (11584666).

20009774 is a wasteful number, since it uses less digits than its factorization.

20009774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526594.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 20009774 is about 4473.2285879441. The cubic root of 20009774 is about 271.4859723213.

Adding to 20009774 its reverse (47790002), we get a palindrome (67799776).

The spelling of 20009774 in words is "twenty million, nine thousand, seven hundred seventy-four".