20064646 has 16 divisors (see below), whose sum is σ = 36207360. Its totient is φ = 8146440.

The previous prime is 20064637. The next prime is 20064659. The reversal of 20064646 is 64646002.

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, 37450 + ... + 37981.

It is an arithmetic number, because the mean of its divisors is an integer number (2262960).

Almost surely, 2^20064646 is an apocalyptic number.

20064646 is a deficient number, since it is larger than the sum of its proper divisors (16142714).

20064646 is a wasteful number, since it uses less digits than its factorization.

20064646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75459.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 20064646 is about 4479.3577664661. The cubic root of 20064646 is about 271.7339075196.

It can be divided in two parts, 200 and 64646, that added together give a palindrome (64846).

The spelling of 20064646 in words is "twenty million, sixty-four thousand, six hundred forty-six".