20009602 has 4 divisors (see below), whose sum is σ = 30014406. Its totient is φ = 10004800.

The previous prime is 20009597. The next prime is 20009611. The reversal of 20009602 is 20690002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17732521 + 2277081 = 4211^2 + 1509^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20009602.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5002399 + ... + 5002402.

Almost surely, 2^20009602 is an apocalyptic number.

20009602 is a deficient number, since it is larger than the sum of its proper divisors (10004804).

20009602 is a wasteful number, since it uses less digits than its factorization.

20009602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10004803.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 20009602 is about 4473.2093624153. The cubic root of 20009602 is about 271.4851944395.

Adding to 20009602 its reverse (20690002), we get a palindrome (40699604).

The spelling of 20009602 in words is "twenty million, nine thousand, six hundred two".