20580090 has 16 divisors (see below), whose sum is σ = 49392288. Its totient is φ = 5488016.

The previous prime is 20580089. The next prime is 20580107. The reversal of 20580090 is 9008502.

It is a self number, because there is not a number n which added to its sum of digits gives 20580090.

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 in 7 ways as a sum of consecutive naturals, for example, 342972 + ... + 343031.

It is an arithmetic number, because the mean of its divisors is an integer number (3087018).

Almost surely, 2^20580090 is an apocalyptic number.

20580090 is an abundant number, since it is smaller than the sum of its proper divisors (28812198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20580090 is a wasteful number, since it uses less digits than its factorization.

20580090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686013.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 20580090 is about 4536.5284083757. The cubic root of 20580090 is about 274.0411343575.

Adding to 20580090 its reverse (9008502), we get a palindrome (29588592).

The spelling of 20580090 in words is "twenty million, five hundred eighty thousand, ninety".