20490334 has 8 divisors (see below), whose sum is σ = 30754728. Its totient is φ = 10238760.

The previous prime is 20490319. The next prime is 20490343. The reversal of 20490334 is 43309402.

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

It is a junction number, because it is equal to n+sod(n) for n = 20490299 and 20490308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4449 + ... + 7795.

It is an arithmetic number, because the mean of its divisors is an integer number (3844341).

Almost surely, 2^20490334 is an apocalyptic number.

20490334 is a deficient number, since it is larger than the sum of its proper divisors (10264394).

20490334 is a wasteful number, since it uses less digits than its factorization.

20490334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6410.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 20490334 is about 4526.6250120813. The cubic root of 20490334 is about 273.6421616768.

Adding to 20490334 its reverse (43309402), we get a palindrome (63799736).

The spelling of 20490334 in words is "twenty million, four hundred ninety thousand, three hundred thirty-four".