20339290 has 8 divisors (see below), whose sum is σ = 36610740. Its totient is φ = 8135712.

The previous prime is 20339287. The next prime is 20339311. The reversal of 20339290 is 9293302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20223009 + 116281 = 4497^2 + 341^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 1016955 + ... + 1016974.

Almost surely, 2^20339290 is an apocalyptic number.

20339290 is a deficient number, since it is larger than the sum of its proper divisors (16271450).

20339290 is a wasteful number, since it uses less digits than its factorization.

20339290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033936.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 20339290 is about 4509.9101986625. The cubic root of 20339290 is about 272.9681205423.

It can be divided in two parts, 203 and 39290, that added together give a palindrome (39493).

The spelling of 20339290 in words is "twenty million, three hundred thirty-nine thousand, two hundred ninety".