20667088 has 40 divisors (see below), whose sum is σ = 43795808. Its totient is φ = 9389952.

The previous prime is 20667067. The next prime is 20667107. The reversal of 20667088 is 88076602.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13195 + ... + 14677.

Almost surely, 2^20667088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20667088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21897904).

20667088 is an abundant number, since it is smaller than the sum of its proper divisors (23128720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20667088 is a wasteful number, since it uses less digits than its factorization.

20667088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571 (or 1565 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 20667088 is about 4546.1069059141. The cubic root of 20667088 is about 274.4267419191.

The spelling of 20667088 in words is "twenty million, six hundred sixty-seven thousand, eighty-eight".