20790430 has 16 divisors (see below), whose sum is σ = 37897920. Its totient is φ = 8210592.

The previous prime is 20790409. The next prime is 20790431. The reversal of 20790430 is 3409702.

It is a junction number, because it is equal to n+sod(n) for n = 20790395 and 20790404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20790431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12369 + ... + 13948.

It is an arithmetic number, because the mean of its divisors is an integer number (2368620).

Almost surely, 2^20790430 is an apocalyptic number.

20790430 is a deficient number, since it is larger than the sum of its proper divisors (17107490).

20790430 is a wasteful number, since it uses less digits than its factorization.

20790430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26403.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 20790430 is about 4559.6523990322. The cubic root of 20790430 is about 274.9715893515.

The spelling of 20790430 in words is "twenty million, seven hundred ninety thousand, four hundred thirty".