20570790 has 32 divisors (see below), whose sum is σ = 49885920. Its totient is φ = 5428224.

The previous prime is 20570789. The next prime is 20570821. The reversal of 20570790 is 9707502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 625 + ... + 6444.

It is an arithmetic number, because the mean of its divisors is an integer number (1558935).

Almost surely, 2^20570790 is an apocalyptic number.

20570790 is an abundant number, since it is smaller than the sum of its proper divisors (29315130).

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

20570790 is a wasteful number, since it uses less digits than its factorization.

20570790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7176.

The product of its (nonzero) digits is 4410, while the sum is 30.

The square root of 20570790 is about 4535.5032796813. The cubic root of 20570790 is about 273.9998490418. Note that the first 3 decimals are identical.

The spelling of 20570790 in words is "twenty million, five hundred seventy thousand, seven hundred ninety".