20066790 has 32 divisors (see below), whose sum is σ = 48775680. Its totient is φ = 5282784.

The previous prime is 20066777. The next prime is 20066797. The reversal of 20066790 is 9766002.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20066797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1864 + ... + 6603.

It is an arithmetic number, because the mean of its divisors is an integer number (1524240).

Almost surely, 2^20066790 is an apocalyptic number.

20066790 is an abundant number, since it is smaller than the sum of its proper divisors (28708890).

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

20066790 is a wasteful number, since it uses less digits than its factorization.

20066790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8556.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 20066790 is about 4479.5970800955. The cubic root of 20066790 is about 271.7435858488.

The spelling of 20066790 in words is "twenty million, sixty-six thousand, seven hundred ninety".