20430002 has 4 divisors (see below), whose sum is σ = 30645006. Its totient is φ = 10215000.

The previous prime is 20429993. The next prime is 20430029. The reversal of 20430002 is 20003402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20003402 = 2 ⋅10001701.

It can be written as a sum of positive squares in only one way, i.e., 14432401 + 5997601 = 3799^2 + 2449^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5107499 + ... + 5107502.

Almost surely, 2^20430002 is an apocalyptic number.

20430002 is a deficient number, since it is larger than the sum of its proper divisors (10215004).

20430002 is a wasteful number, since it uses less digits than its factorization.

20430002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10215003.

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 20430002 is about 4519.9559732369. The cubic root of 20430002 is about 273.3733258291.

Adding to 20430002 its reverse (20003402), we get a palindrome (40433404).

The spelling of 20430002 in words is "twenty million, four hundred thirty thousand, two".