20497146 has 8 divisors (see below), whose sum is σ = 40994304. Its totient is φ = 6832380.

The previous prime is 20497129. The next prime is 20497157. The reversal of 20497146 is 64179402.

It is a happy number.

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

20497146 is an admirable number.

It is an unprimeable number.

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, 1708090 + ... + 1708101.

It is an arithmetic number, because the mean of its divisors is an integer number (5124288).

Almost surely, 2^20497146 is an apocalyptic number.

20497146 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.

20497146 is a wasteful number, since it uses less digits than its factorization.

20497146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3416196.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 20497146 is about 4527.3773865230. The cubic root of 20497146 is about 273.6724823779.

The spelling of 20497146 in words is "twenty million, four hundred ninety-seven thousand, one hundred forty-six".