20339390 has 8 divisors (see below), whose sum is σ = 36610920. Its totient is φ = 8135752.

The previous prime is 20339377. The next prime is 20339393. The reversal of 20339390 is 9393302.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20339393) 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, 1016960 + ... + 1016979.

It is an arithmetic number, because the mean of its divisors is an integer number (4576365).

Almost surely, 2^20339390 is an apocalyptic number.

20339390 is a deficient number, since it is larger than the sum of its proper divisors (16271530).

20339390 is a wasteful number, since it uses less digits than its factorization.

20339390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033946.

The product of its (nonzero) digits is 4374, while the sum is 29.

The square root of 20339390 is about 4509.9212853441. The cubic root of 20339390 is about 272.9685678992.

It can be divided in two parts, 203 and 39390, that added together give a palindrome (39593).

The spelling of 20339390 in words is "twenty million, three hundred thirty-nine thousand, three hundred ninety".