20009002 has 8 divisors (see below), whose sum is σ = 32322276. Its totient is φ = 9234912.

The previous prime is 20008999. The next prime is 20009029. The reversal of 20009002 is 20090002.

It can be written as a sum of positive squares in 2 ways, for example, as 19545241 + 463761 = 4421^2 + 681^2 .

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

It is a super-2 number, since 2×20009002² = 800720322072008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

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, 384763 + ... + 384814.

Almost surely, 2^20009002 is an apocalyptic number.

20009002 is a deficient number, since it is larger than the sum of its proper divisors (12313274).

20009002 is a wasteful number, since it uses less digits than its factorization.

20009002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769592.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 20009002 is about 4473.1422959705. The cubic root of 20009002 is about 271.4824808632.

Adding to 20009002 its reverse (20090002), we get a palindrome (40099004).

The spelling of 20009002 in words is "twenty million, nine thousand, two".