20620590 has 32 divisors (see below), whose sum is σ = 50232960. Its totient is φ = 5416224.

The previous prime is 20620583. The next prime is 20620591. The reversal of 20620590 is 9502602.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20620590.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20620591) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3120 + ... + 7139.

It is an arithmetic number, because the mean of its divisors is an integer number (1569780).

Almost surely, 2^20620590 is an apocalyptic number.

20620590 is an abundant number, since it is smaller than the sum of its proper divisors (29612370).

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

20620590 is a wasteful number, since it uses less digits than its factorization.

20620590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10336.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 20620590 is about 4540.9899801695. The cubic root of 20620590 is about 274.2207803723.

The spelling of 20620590 in words is "twenty million, six hundred twenty thousand, five hundred ninety".