20290346 has 8 divisors (see below), whose sum is σ = 30802464. Its totient is φ = 10022860.

The previous prime is 20290331. The next prime is 20290349. The reversal of 20290346 is 64309202.

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 (20290349) by changing a digit.

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, 60950 + ... + 61281.

It is an arithmetic number, because the mean of its divisors is an integer number (3850308).

Almost surely, 2^20290346 is an apocalyptic number.

20290346 is a deficient number, since it is larger than the sum of its proper divisors (10512118).

20290346 is a wasteful number, since it uses less digits than its factorization.

20290346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122316.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 20290346 is about 4504.4806581891. The cubic root of 20290346 is about 272.7489899407.

Adding to 20290346 its reverse (64309202), we get a palindrome (84599548).

The spelling of 20290346 in words is "twenty million, two hundred ninety thousand, three hundred forty-six".