20330890 has 8 divisors (see below), whose sum is σ = 36595620. Its totient is φ = 8132352.

The previous prime is 20330879. The next prime is 20330899. The reversal of 20330890 is 9803302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19793601 + 537289 = 4449^2 + 733^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20330899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1016535 + ... + 1016554.

Almost surely, 2^20330890 is an apocalyptic number.

20330890 is a deficient number, since it is larger than the sum of its proper divisors (16264730).

20330890 is a wasteful number, since it uses less digits than its factorization.

20330890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033096.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20330890 is about 4508.9788200878. The cubic root of 20330890 is about 272.9305373238.

The spelling of 20330890 in words is "twenty million, three hundred thirty thousand, eight hundred ninety".