20807030 has 16 divisors (see below), whose sum is σ = 37818144. Its totient is φ = 8241600.

The previous prime is 20807011. The next prime is 20807069. The reversal of 20807030 is 3070802.

It is a junction number, because it is equal to n+sod(n) for n = 20806993 and 20807011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9071 + ... + 11130.

It is an arithmetic number, because the mean of its divisors is an integer number (2363634).

Almost surely, 2^20807030 is an apocalyptic number.

20807030 is a deficient number, since it is larger than the sum of its proper divisors (17011114).

20807030 is a wasteful number, since it uses less digits than its factorization.

20807030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20311.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 20807030 is about 4561.4723500203. The cubic root of 20807030 is about 275.0447530471.

Adding to 20807030 its reverse (3070802), we get a palindrome (23877832).

The spelling of 20807030 in words is "twenty million, eight hundred seven thousand, thirty".