20064664 has 8 divisors (see below), whose sum is σ = 37621260. Its totient is φ = 10032328.

The previous prime is 20064659. The next prime is 20064677. The reversal of 20064664 is 46646002.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1254034 + ... + 1254049.

Almost surely, 2^20064664 is an apocalyptic number.

It is an amenable number.

20064664 is a deficient number, since it is larger than the sum of its proper divisors (17556596).

20064664 is a wasteful number, since it uses less digits than its factorization.

20064664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508089 (or 2508085 counting only the distinct ones).

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

The square root of 20064664 is about 4479.3597756822. The cubic root of 20064664 is about 271.7339887771.

It can be divided in two parts, 2006 and 4664, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 20064664 in words is "twenty million, sixty-four thousand, six hundred sixty-four".