20590047 has 12 divisors (see below), whose sum is σ = 29798080. Its totient is φ = 13700448.

The previous prime is 20590039. The next prime is 20590049. The reversal of 20590047 is 74009502.

It is not a de Polignac number, because 20590047 - 2³ = 20590039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20590047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20590049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3579 + ... + 7347.

Almost surely, 2^20590047 is an apocalyptic number.

20590047 is a deficient number, since it is larger than the sum of its proper divisors (9208033).

20590047 is a wasteful number, since it uses less digits than its factorization.

20590047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4382 (or 4379 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 20590047 is about 4537.6257007382. The cubic root of 20590047 is about 274.0853224967.

Adding to 20590047 its reverse (74009502), we get a palindrome (94599549).

The spelling of 20590047 in words is "twenty million, five hundred ninety thousand, forty-seven".