20064577 has 4 divisors (see below), whose sum is σ = 21608020. Its totient is φ = 18521136.

The previous prime is 20064563. The next prime is 20064587. The reversal of 20064577 is 77546002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2792241 + 17272336 = 1671^2 + 4156^2 .

It is a cyclic number.

It is not a de Polignac number, because 20064577 - 2⁷ = 20064449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20064587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771702 + ... + 771727.

It is an arithmetic number, because the mean of its divisors is an integer number (5402005).

Almost surely, 2^20064577 is an apocalyptic number.

It is an amenable number.

20064577 is a deficient number, since it is larger than the sum of its proper divisors (1543443).

20064577 is a wasteful number, since it uses less digits than its factorization.

20064577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543442.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 20064577 is about 4479.3500644625. The cubic root of 20064577 is about 271.7335960321.

The spelling of 20064577 in words is "twenty million, sixty-four thousand, five hundred seventy-seven".