20390334 has 8 divisors (see below), whose sum is σ = 40780680. Its totient is φ = 6796776.

The previous prime is 20390333. The next prime is 20390353. The reversal of 20390334 is 43309302.

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

20390334 is an admirable number.

It is a super-3 number, since 3×20390334³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20390333) 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, 1699189 + ... + 1699200.

It is an arithmetic number, because the mean of its divisors is an integer number (5097585).

Almost surely, 2^20390334 is an apocalyptic number.

20390334 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20390334 is a wasteful number, since it uses less digits than its factorization.

20390334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3398394.

The product of its (nonzero) digits is 1944, while the sum is 24.

The square root of 20390334 is about 4515.5657452860. The cubic root of 20390334 is about 273.1962790327.

Adding to 20390334 its reverse (43309302), we get a palindrome (63699636).

The spelling of 20390334 in words is "twenty million, three hundred ninety thousand, three hundred thirty-four".