20670668 has 6 divisors (see below), whose sum is σ = 36173676. Its totient is φ = 10335332.

The previous prime is 20670667. The next prime is 20670673. The reversal of 20670668 is 86607602.

It is not an unprimeable number, because it can be changed into a prime (20670667) 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 as a sum of consecutive naturals, namely, 2583830 + ... + 2583837.

It is an arithmetic number, because the mean of its divisors is an integer number (6028946).

Almost surely, 2^20670668 is an apocalyptic number.

It is an amenable number.

20670668 is a deficient number, since it is larger than the sum of its proper divisors (15503008).

20670668 is a wasteful number, since it uses less digits than its factorization.

20670668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5167671 (or 5167669 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 20670668 is about 4546.5006323545. The cubic root of 20670668 is about 274.4425866125.

The spelling of 20670668 in words is "twenty million, six hundred seventy thousand, six hundred sixty-eight".