20670064 has 20 divisors (see below), whose sum is σ = 40125904. Its totient is φ = 10315008.

The previous prime is 20670061. The next prime is 20670137. The reversal of 20670064 is 46007602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20670061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10744 + ... + 12520.

Almost surely, 2^20670064 is an apocalyptic number.

It is an amenable number.

20670064 is a deficient number, since it is larger than the sum of its proper divisors (19455840).

20670064 is a wasteful number, since it uses less digits than its factorization.

20670064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512 (or 2506 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 20670064 is about 4546.4342071562. The cubic root of 20670064 is about 274.4399135020.

Adding to 20670064 its reverse (46007602), we get a palindrome (66677666).

The spelling of 20670064 in words is "twenty million, six hundred seventy thousand, sixty-four".