20491662 has 8 divisors (see below), whose sum is σ = 40983336. Its totient is φ = 6830552.

The previous prime is 20491631. The next prime is 20491699. The reversal of 20491662 is 26619402.

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

20491662 is an admirable number.

It is a congruent 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, 1707633 + ... + 1707644.

It is an arithmetic number, because the mean of its divisors is an integer number (5122917).

Almost surely, 2^20491662 is an apocalyptic number.

20491662 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.

20491662 is a wasteful number, since it uses less digits than its factorization.

20491662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3415282.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 20491662 is about 4526.7716973578. The cubic root of 20491662 is about 273.6480732274.

The spelling of 20491662 in words is "twenty million, four hundred ninety-one thousand, six hundred sixty-two".