20090670 has 16 divisors (see below), whose sum is σ = 48217680. Its totient is φ = 5357504.

The previous prime is 20090659. The next prime is 20090671. The reversal of 20090670 is 7609002.

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 20090670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20090671) 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 7 ways as a sum of consecutive naturals, for example, 334815 + ... + 334874.

It is an arithmetic number, because the mean of its divisors is an integer number (3013605).

Almost surely, 2^20090670 is an apocalyptic number.

20090670 is an abundant number, since it is smaller than the sum of its proper divisors (28127010).

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

20090670 is a wasteful number, since it uses less digits than its factorization.

20090670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669699.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 20090670 is about 4482.2617058802. The cubic root of 20090670 is about 271.8513370871.

Adding to 20090670 its reverse (7609002), we get a palindrome (27699672).

The spelling of 20090670 in words is "twenty million, ninety thousand, six hundred seventy".