20307026 has 4 divisors (see below), whose sum is σ = 30460542. Its totient is φ = 10153512.

The previous prime is 20306987. The next prime is 20307037. The reversal of 20307026 is 62070302.

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., 15249025 + 5058001 = 3905^2 + 2249^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20306989 and 20307007.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5076755 + ... + 5076758.

Almost surely, 2^20307026 is an apocalyptic number.

20307026 is a deficient number, since it is larger than the sum of its proper divisors (10153516).

20307026 is a wasteful number, since it uses less digits than its factorization.

20307026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10153515.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 20307026 is about 4506.3317676354. The cubic root of 20307026 is about 272.8237086775.

Adding to 20307026 its reverse (62070302), we get a palindrome (82377328).

The spelling of 20307026 in words is "twenty million, three hundred seven thousand, twenty-six".