20205002 has 4 divisors (see below), whose sum is σ = 30307506. Its totient is φ = 10102500.

The previous prime is 20205001. The next prime is 20205023. The reversal of 20205002 is 20050202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20050202 = 2 ⋅10025101.

It can be written as a sum of positive squares in only one way, i.e., 13697401 + 6507601 = 3701^2 + 2551^2 .

It is not an unprimeable number, because it can be changed into a prime (20205001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5051249 + ... + 5051252.

Almost surely, 2^20205002 is an apocalyptic number.

20205002 is a deficient number, since it is larger than the sum of its proper divisors (10102504).

20205002 is a wasteful number, since it uses less digits than its factorization.

20205002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10102503.

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 20205002 is about 4494.9974416011. The cubic root of 20205002 is about 272.3660458813.

Adding to 20205002 its reverse (20050202), we get a palindrome (40255204).

The spelling of 20205002 in words is "twenty million, two hundred five thousand, two".