20667628 has 12 divisors (see below), whose sum is σ = 36266440. Its totient is φ = 10305792.

The previous prime is 20667623. The next prime is 20667629. The reversal of 20667628 is 82676602.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20667623) 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, 5301 + ... + 8332.

Almost surely, 2^20667628 is an apocalyptic number.

It is an amenable number.

20667628 is a deficient number, since it is larger than the sum of its proper divisors (15598812).

20667628 is a wasteful number, since it uses less digits than its factorization.

20667628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14016 (or 14014 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 20667628 is about 4546.1662970023. The cubic root of 20667628 is about 274.4291320180.

The spelling of 20667628 in words is "twenty million, six hundred sixty-seven thousand, six hundred twenty-eight".