20497346 has 8 divisors (see below), whose sum is σ = 30783564. Its totient is φ = 10236160.

The previous prime is 20497331. The next prime is 20497363. The reversal of 20497346 is 64379402.

It can be written as a sum of positive squares in 2 ways, for example, as 20349121 + 148225 = 4511^2 + 385^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4055 + ... + 7578.

Almost surely, 2^20497346 is an apocalyptic number.

20497346 is a deficient number, since it is larger than the sum of its proper divisors (10286218).

20497346 is a wasteful number, since it uses less digits than its factorization.

20497346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12516.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 20497346 is about 4527.3994743119. The cubic root of 20497346 is about 273.6733724907.

The spelling of 20497346 in words is "twenty million, four hundred ninety-seven thousand, three hundred forty-six".