20046491 has 8 divisors (see below), whose sum is σ = 21034368. Its totient is φ = 19080000.

The previous prime is 20046479. The next prime is 20046493. The reversal of 20046491 is 19464002.

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

It is a cyclic number.

It is not a de Polignac number, because 20046491 - 2⁶ = 20046427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20046491.

It is not an unprimeable number, because it can be changed into a prime (20046493) 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 7 ways as a sum of consecutive naturals, for example, 3410 + ... + 7191.

It is an arithmetic number, because the mean of its divisors is an integer number (2629296).

Almost surely, 2^20046491 is an apocalyptic number.

20046491 is a deficient number, since it is larger than the sum of its proper divisors (987877).

20046491 is a wasteful number, since it uses less digits than its factorization.

20046491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10693.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20046491 is about 4477.3307896558. The cubic root of 20046491 is about 271.6519255470.

The spelling of 20046491 in words is "twenty million, forty-six thousand, four hundred ninety-one".