20064491 has 8 divisors (see below), whose sum is σ = 20807280. Its totient is φ = 19325152.

The previous prime is 20064481. The next prime is 20064493. The reversal of 20064491 is 19446002.

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 20064491 - 2¹⁰ = 20063467 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20064491.

It is not an unprimeable number, because it can be changed into a prime (20064493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19301 + ... + 20313.

It is an arithmetic number, because the mean of its divisors is an integer number (2600910).

Almost surely, 2^20064491 is an apocalyptic number.

20064491 is a deficient number, since it is larger than the sum of its proper divisors (742789).

20064491 is a wasteful number, since it uses less digits than its factorization.

20064491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725.

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

The square root of 20064491 is about 4479.3404648452. The cubic root of 20064491 is about 271.7332078002.

The spelling of 20064491 in words is "twenty million, sixty-four thousand, four hundred ninety-one".