20064405 has 8 divisors (see below), whose sum is σ = 32103072. Its totient is φ = 10701008.

The previous prime is 20064391. The next prime is 20064413. The reversal of 20064405 is 50446002.

It is a happy number.

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 20064405 - 2⁴ = 20064389 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 668799 + ... + 668828.

It is an arithmetic number, because the mean of its divisors is an integer number (4012884).

Almost surely, 2^20064405 is an apocalyptic number.

It is an amenable number.

20064405 is a deficient number, since it is larger than the sum of its proper divisors (12038667).

20064405 is a wasteful number, since it uses less digits than its factorization.

20064405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337635.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20064405 is about 4479.3308652074. The cubic root of 20064405 is about 271.7328195673.

The spelling of 20064405 in words is "twenty million, sixty-four thousand, four hundred five".